Inherited Jewellery and Family Valuables, Why Expert Assessment Matters

 

Inherited jewellery, diamonds, gold and family heirlooms can represent significant financial and sentimental value. Before dividing an estate, selling precious items or passing them on to the next generation, it is essential to understand exactly what you own. With three generations of gold and diamond industry experience and the specialist capabilities of the Diamond Certification Laboratory of Australia (DCLA), families, estate lawyers and executors can access the expertise they need to make informed decisions with confidence.

Protecting the Value of an Inheritance

When a loved one passes away, their estate may contain a lifetime of accumulated possessions, including diamond rings, gold chains, bracelets, watches, coins, precious stones and other valuable jewellery. Some pieces may have been purchased recently, while others may have been passed down through several generations.

Many of these items carry stories, memories and emotional significance. However, their financial value is not always obvious.

An old engagement ring may contain a significant natural diamond. A collection of gold jewellery may be worth considerably more than its owner realised. A brooch, pendant or inherited watch may contain valuable materials or gemstones that have never been professionally examined.

Equally, a piece that looks impressive may have a lower resale value than expected, while an older valuation may no longer accurately reflect current market conditions.

The first step in protecting an inheritance is establishing what the estate actually contains and obtaining an appropriate professional assessment of its value.

The DCLA and The Gold Company provide specialist expertise to help clients understand their diamonds, jewellery and precious metals, with services suited to individual owners, families and professional estate representatives.

For a broader overview of the available services, visit The Gold Company’s Jewellery and Diamond Valuation and Estate Services.

Why Professional Assessment Matters

Diamonds, gemstones and precious metals require different forms of examination. A visual inspection alone cannot reliably establish every characteristic that may influence an item’s value.

A diamond’s quality depends on several factors, including its cut, colour, clarity and carat weight. Its origin, treatments, proportions and other characteristics may also be relevant.

The distinction between natural and laboratory-grown diamonds is particularly important. Both are genuine diamonds, but their origins and market characteristics differ. A stone’s appearance or a basic diamond tester cannot reliably establish whether it formed naturally or was grown in a laboratory.

The DCLA provides independent diamond grading and identification services using qualified gemmological expertise and specialised laboratory equipment.

Learn more about the DCLA Diamond Grading Report and Certification Service.

Professional assessment is equally important when dealing with gold and other precious metals. Jewellery may contain different purities of gold, mixed metals, gemstone settings, replacement components or materials that are not immediately apparent. Hallmarks can provide useful clues, but they should not always be treated as conclusive evidence of an item’s composition.

The Gold Company offers professional precious-metal testing, including X-ray fluorescence (XRF) technology, which can analyse the metal composition of suitable items without the need for destructive testing.

Read more about XRF Gold Testing and Understanding the Gold Content of Jewellery.

Combining practical industry experience with appropriate testing helps reduce uncertainty and gives owners a more reliable basis for deciding what to do next.

Three Generations of Gold and Diamond Expertise

The DCLA’s approach is supported by a heritage of gold and diamond industry knowledge spanning three generations, from mining and manufacturing through to diamond processing, jewellery, trading and professional laboratory assessment.

This experience provides a perspective that extends well beyond the appearance of a finished piece of jewellery. It includes an understanding of how diamonds are cut and polished, how precious metals are used in jewellery manufacturing, and how quality, condition and market demand can influence value.

That depth of practical knowledge matters when examining inherited items because every piece is different.

A diamond may require specialist laboratory identification. A gold bracelet may need its metal purity established. An antique ring may warrant consideration of its gemstones, craftsmanship, condition and design, rather than simply calculating the weight of its gold.

The DCLA combines this industry heritage with modern gemmological technology and independent assessment.

Its Sydney laboratory uses specialised equipment to examine diamond characteristics, including instruments that assist with diamond screening, microscopic examination, growth-pattern analysis and precise measurement.

Explore the DCLA Laboratory and its Testing Technology.

The principle is straightforward: experience helps identify the questions that need to be asked, while appropriate testing provides evidence to support the assessment.

For clients entrusted with valuable family assets, that combination offers an important level of reassurance.

Inherited Diamonds: Know Exactly What You Have

Diamonds are often among the most significant assets found in inherited jewellery. Yet many families have little documentation about the stones they own.

An engagement ring may have been purchased decades ago, with no original invoice or laboratory report. A diamond necklace may have been passed down through several generations. A loose stone may have been removed from an old setting without any accompanying paperwork.

In these circumstances, assumptions can be costly.

A diamond’s size alone does not determine its value. Two diamonds of similar carat weight can have very different values because of differences in colour, clarity, cut quality, proportions, treatments and market demand.

It is also important to establish whether the stone is natural or laboratory-grown where that distinction is relevant.

An independent grading report can document a diamond’s examined characteristics, providing a reference for future insurance, estate administration, sale or personal records.

The DCLA’s Diamond Certification FAQs explain the purpose of diamond reports, the grading process and the distinction between certification and valuation.

What if the diamond is still set in a ring?

Many inherited diamonds remain mounted in their original jewellery. Depending on the setting and the examination required, accurate grading may require the stone to be removed so that its weight, measurements, colour and clarity can be assessed more precisely.

This should not be undertaken casually. Removing a stone can affect the setting, particularly where the jewellery has a complex or delicate construction. The appropriate procedure should be discussed with the laboratory and a suitably qualified jeweller before any work is undertaken.

The DCLA explains these considerations in its Diamond Grading Report information.

The objective is to obtain reliable information while treating the jewellery with appropriate care.

Gold Jewellery: More Than Just Its Weight

Gold jewellery is another common component of an inheritance. Chains, rings, bracelets, earrings, brooches and watches may contain substantial quantities of precious metal, even when they are damaged, unfashionable or no longer worn.

However, the value of a gold item depends on more than its overall weight.

The purity of the gold, the amount of actual gold present, current market prices and the terms offered by a prospective buyer all influence its potential resale value. Gemstones, design, craftsmanship and collectability may also matter, meaning some pieces should be assessed as jewellery rather than simply as scrap metal.

For example, an inherited diamond ring may contain both valuable gold and a diamond that deserves independent examination. Selling the entire item solely on the basis of its gold content could overlook other sources of value.

Professional assessment helps determine whether an item is best considered for its precious-metal content, its gemstones, its craftsmanship or a combination of these factors.

The Gold Company provides specialist assistance with gold, silver, platinum, diamonds and jewellery. Its team can explain the available options before a client decides whether to retain, sell or otherwise deal with an item.

For further information, see The Gold Company’s Gold Buying and Testing Services.

Estate Lawyers, Executors and Trustees: Establishing Clarity

For estate lawyers, executors and trustees, inherited jewellery can introduce additional responsibilities.

Before an estate can be distributed, the relevant assets may need to be identified, assessed and documented. Where several beneficiaries are involved, a clear record of the items and their assessed values can help establish a more informed basis for distribution.

Without appropriate documentation, disagreements can arise. One beneficiary may believe a diamond ring is worth considerably more than another family member’s jewellery, while an executor may have no reliable evidence to support either assumption.

A structured assessment can help clarify the assets involved and identify items that require further specialist examination.

Depending on the circumstances, the work may include:

• Identifying and recording individual jewellery items.
• Examining diamonds and other gemstones.
• Testing gold and other precious metals.
• Obtaining independent diamond grading reports where appropriate.
• Preparing written valuations for the intended purpose.
• Documenting findings to assist estate administration and discussions with beneficiaries.
• Explaining options for retaining, distributing or realising the assets.

The appropriate scope of work depends on the estate and the requirements of the legal representative. A grading report, an estate inventory and a formal valuation serve different purposes, so it is important to establish what documentation is required before the assessment begins.

The Gold Company offers a dedicated Jewellery and Diamond Estate Service for families, executors, trustees and solicitors requiring confidential assessments, documented reporting and assistance in understanding their options.

For significant diamonds, the DCLA’s independent laboratory services can provide additional gemmological information to support the process.

Together, these capabilities help make the handling of precious estate assets more transparent and better informed.

Dividing an Inheritance Fairly

Even within close families, dividing an inheritance can be difficult. Sentimental attachment often plays a significant role, and the perceived value of a treasured item may not correspond to its financial value.

One family member may wish to retain a parent’s engagement ring, while another prefers to receive gold jewellery or the proceeds from the sale of a valuable diamond.

Having the items professionally assessed before making these decisions can help everyone understand the assets involved.

A written valuation, where appropriate, provides a reference point for discussions about distribution. Independent diamond grading can also help distinguish between stones that might otherwise appear similar.

This does not remove the emotional considerations associated with inheritance, nor does it determine how a family should divide its possessions. Rather, it provides useful information to help family members and their advisers make their own decisions.

Where the estate contains substantial or particularly valuable diamonds, obtaining appropriate independent documentation before distribution can also make future insurance, sale or transfer arrangements easier to manage.

The objective is to protect the interests of the estate and its beneficiaries by ensuring that important decisions are made with a proper understanding of the items involved.

Understanding the Difference Between a Grading Report and a Valuation

One of the most important distinctions in professional jewellery assessment is the difference between identifying a diamond’s characteristics and determining its monetary value.

A diamond grading report describes the characteristics established during the examination. It is not, by itself, a statement of what the diamond is worth in dollars.

A valuation, on the other hand, estimates monetary value for a particular purpose and at a particular point in time.

For example, an insurance replacement valuation may estimate the cost of replacing an item with a comparable piece through an appropriate retail channel. A resale assessment considers a different question: what the item might realistically achieve in the relevant second-hand or trade market.

These figures can differ substantially.

The original retail price is not necessarily the amount an owner will receive when selling inherited jewellery, and an old insurance valuation should not automatically be treated as a current resale value.

Understanding the purpose of the assessment is therefore essential.

The DCLA explains this distinction in its article, Is a Diamond Valuation the Same as a Diamond Certificate?.

For broader information about professional valuations and their uses, visit the DCLA Appraisal and Valuation Information.

By establishing the correct purpose from the outset, clients can obtain documentation suited to their actual needs rather than relying on a report that answers a different question.

What If You Want to Sell Inherited Jewellery?

Not every family wants to retain all the jewellery they inherit. Some beneficiaries prefer to keep selected pieces and sell the remainder, while others may choose to sell an entire collection.

Before making that decision, it is worth understanding what the items contain and how they are likely to be assessed by prospective buyers.

An item containing a significant diamond may warrant independent grading. Gold jewellery may need to be tested for purity and weight. Pieces with unusual designs, important provenance or collectable characteristics may require a different approach from ordinary scrap gold.

The selling process should begin with knowledge, not assumptions.

The DCLA’s article, Selling a Diamond? Here’s the Paperwork You Need to Know About, explains why independent documentation can help establish a common reference point when discussing a diamond with prospective buyers.

For those considering the sale of inherited gold jewellery, The Gold Company’s guide, Selling Inherited Jewellery in Australia: What You Need to Know, provides further information about the practical considerations involved.

Having an informed assessment does not oblige an owner to sell. It simply provides a stronger basis for deciding whether to retain, insure, distribute or sell the items.

Protecting Your Own Valuables for the Future

The same principles apply even when no inheritance is involved.

Many people own jewellery accumulated over decades, including engagement rings, wedding bands, diamond earrings, necklaces, watches and family heirlooms. Important documents may be missing, descriptions may be incomplete, and valuations may no longer reflect current replacement costs.

Maintaining appropriate records can make a difference when dealing with insurance, estate planning or the eventual transfer of valuables to family members.

Depending on the item and its purpose, useful records may include photographs, descriptions, purchase documentation, independent diamond reports and current valuations.

Owners should also review whether their existing insurance documentation remains suitable and whether the values recorded reflect the purpose of the policy.

The DCLA provides information about Jewellery Valuations, including the importance of maintaining records for valuable possessions.

Taking these steps while the owner is still able to explain the history of each item can help future family members understand what they have inherited and what further assessment may be needed.

Experience, Technology and Personal Service

Precious jewellery deserves more than a cursory inspection or an assumption about its worth. It deserves to be examined by people who understand diamonds, gold and the jewellery industry.

The DCLA brings specialist gemmological expertise and advanced laboratory technology to the identification and grading of diamonds. The Gold Company provides practical assistance with jewellery, precious-metal testing, valuations and inherited assets.

The group’s three generations of gold and diamond industry knowledge provide valuable context for understanding the materials, craftsmanship and market considerations behind these possessions.

Whether you are an estate lawyer managing a deceased estate, an executor responsible for distributing family assets, a family dividing an inheritance or an individual seeking clarity about a treasured possession, the objective remains the same: to help you understand what you own and make informed decisions about what comes next.

There is no need to guess, and there is no obligation to sell simply because an item has been assessed.

Professional advice should give you the information and options you need, allowing you to decide what is right for you and your family.

DCLA and The Gold Company: Expertise When It Matters

From a single inherited engagement ring to a substantial estate containing diamonds, gold and other precious valuables, the right assessment can make an important difference.

With three generations of gold and diamond industry experience, decades of practical knowledge and the specialist capabilities of the DCLA laboratory, we are here to help families and professional advisers navigate the complexities of precious assets.

Before you divide it, sell it, insure it or pass it on, make sure you know what you have.

Visit DCLA for independent diamond grading, identification and laboratory services, or visit The Gold Company to learn more about jewellery and precious-metal assessments, valuations and estate services.

DCLA and The Gold Company — generations of knowledge, specialist expertise and professional guidance to help protect the value of your diamonds, jewellery and family valuables.

Geneva Auction to Feature Rare 8.63 Carat Pink Diamond

 

An exceptional 8.63 carat natural pink diamond is set to take centre stage at Sotheby’s High Jewelry auction in Geneva on 11 November 2026, with an estimated price of up to US$6 million. The stone highlights the extraordinary rarity of natural pink diamonds and the continuing fascination they hold for collectors of important gemstones.

The unmounted oval modified brilliant cut diamond has been graded Fancy Intense Pink, VS2 clarity and Type IIa. Sotheby’s will present it as the leading lot in its High Jewelry sale, which will take place immediately before the auction house’s Royal & Noble Jewels sale in Geneva.

The diamond carries an estimated value of CHF 3.3 million to CHF 5 million, equivalent to approximately US$4 million to US$6 million. Its combination of substantial carat weight, intense natural colour and desirable gemological characteristics places it among the notable coloured diamonds appearing at international auction this season.

Where are natural pink diamonds found?

Natural pink diamonds have been recovered from several regions around the world, including Australia, South Africa, Lesotho, Tanzania, Russia, Brazil, Canada and historically India. However, these sources have not contributed equally to the market, and the geological conditions required to produce diamonds with a strong natural pink colour are exceptionally uncommon.

For decades, the most important commercial source was the Argyle diamond mine in Western Australia. Argyle became internationally renowned for its pink and red diamonds, despite these stones representing only a tiny fraction of the mine’s overall diamond production. The mine ceased operations in 2020, bringing an end to the regular supply from the world’s most significant historical source of pink diamonds.

Since the closure, the market has become even more conscious of the finite supply of Argyle-origin stones. However, pink diamonds continue to be found elsewhere, and discoveries in places such as Lesotho demonstrate that the geological potential for exceptional pink diamonds extends beyond Australia.

South Africa has its own distinguished place in this history, having produced some of the most famous large pink diamonds ever discovered.

The Steinmetz Pink: a South African diamond of extraordinary scale

One of the most remarkable examples of South Africa’s contribution to the world of natural pink diamonds is the legendary 59.60 carat Steinmetz Pink, now known as the CTF Pink Star.

The diamond began as a 132.50 carat rough crystal mined by De Beers in Africa in 1999. It was subsequently cut and polished by Steinmetz Diamonds over nearly two years, emerging as an oval diamond graded Fancy Vivid Pink and Internally Flawless by the Gemological Institute of America (GIA). It was unveiled publicly in Monaco in 2003 as the Steinmetz Pink.

The diamond later became known as the Pink Star and, following its acquisition by Hong Kong jewellery group Chow Tai Fook, the CTF Pink Star. In April 2017, it sold at Sotheby’s Hong Kong auction for HK$553 million, approximately US$71.2 million, setting a world auction record for a diamond or gemstone.

Its history illustrates why South Africa remains an important part of the story of exceptional pink diamonds. The country’s historic diamond fields have produced important coloured stones, including diamonds of remarkable size and quality.
Why are some pink diamonds so large?

The size of an exceptional pink diamond is not simply a consequence of its colour. Pink diamonds can occur in different geological environments, and their colour is associated with structural deformation within the diamond’s crystal lattice. This deformation affects how the stone interacts with light, producing its characteristic pink appearance. The precise mechanisms responsible for colour can vary between stones.

South Africa’s historic diamond deposits have produced large, important diamonds, while the Argyle mine in Australia became the dominant commercial source of pink diamonds because of the frequency with which pink stones appeared in its production. These are distinct geological and mining histories, rather than evidence that one country exclusively produces the largest pink diamonds.

The Steinmetz Pink demonstrates what can happen when a substantial rough diamond combines with exceptional colour and clarity. Its finished weight of 59.60 carats is particularly extraordinary because cutting a rough diamond involves balancing the retention of carat weight against the need to maximise colour, clarity, symmetry and overall appearance.

Unlike colourless diamonds, where the absence of colour is a major grading consideration, fancy coloured diamonds are assessed principally for their colour characteristics. These include hue, tone and saturation, alongside the stone’s clarity, carat weight, cut and overall appearance.

The distinction between Fancy Intense Pink and Fancy Vivid Pink is important. Fancy Vivid Pink represents a higher colour-intensity category, but it does not automatically follow that every vivid pink diamond is more valuable than every intense pink diamond. Size, clarity, colour distribution, cutting quality and market demand all influence the final price.

The November Geneva offering is graded Fancy Intense Pink with VS2 clarity. Its 8.63 carat weight and reported Type IIa classification add further gemological interest. Type IIa diamonds contain extremely low levels of nitrogen and can possess exceptional optical properties, although this classification alone does not establish a diamond’s value or geographic origin.

For DCLA, the auction is a reminder of the importance of independent gemological assessment when dealing with exceptional natural coloured diamonds. Reliable identification, colour grading, clarity assessment and documentation are essential to understanding what makes each stone distinctive.

A rare natural treasure in a changing market

The closure of the Argyle mine has brought greater attention to the scarcity of natural pink diamonds, particularly stones with strong colour and significant carat weight. While new discoveries remain possible in other diamond-producing regions, exceptional natural pink diamonds continue to be rare.

The upcoming Sotheby’s Geneva sale will provide another opportunity to see how collectors respond to a remarkable natural coloured diamond. Whether the 8.63 carat stone reaches its upper estimate remains to be seen, but its appearance at auction reinforces the enduring appeal of gemstones whose beauty is the result of extraordinary geological processes.

From South Africa’s famous Steinmetz Pink to the celebrated pink diamonds of Australia’s Argyle mine, these stones represent some of the most remarkable achievements of nature and the skill of the diamond cutter.

For further reading, explore DCLA’s coverage of Boodles and its major Argyle diamond acquisition and the laboratory’s historical report on the 59.60 carat pink diamond’s record-breaking auction.

DCLA is the Diamond Certification Laboratory of Australia. Independent gemological examination and accurate reporting help establish a diamond’s characteristics and support informed understanding of these rare natural treasures.

Inclusion Size Alone Does Not Determine a Diamond's Grade

 

Diamond Science, Grading and Transparency

Introduction

Diamond clarity is often misunderstood as a straightforward measurement of the size of an inclusion relative to the size of the diamond. While inclusion size is an important grading consideration, it is only one component of a more comprehensive gemmological assessment.

Two diamonds containing inclusions of apparently identical size and colour may receive different clarity grades because the inclusions differ in position, nature, contrast and overall visual impact. The diamond’s shape, facet arrangement and optical behaviour can also influence how readily an inclusion is observed.

At the Diamond Certification Laboratory of Australia (DCLA), diamond grading follows established International Diamond Council (IDC) nomenclature and grading principles. DCLA also assesses transparency as a separate characteristic, helping to distinguish the visibility of individual inclusions from the degree to which internal features interfere with light transmission.

Understanding these distinctions is essential when interpreting a diamond grading report and evaluating the relationship between clarity, transparency and overall optical performance.

1. Diamond clarity is more than inclusion size

Diamond clarity describes the internal characteristics, known as inclusions, and external characteristics, known as blemishes, that are observed during examination.

The commonly used clarity scale ranges from Flawless (FL) and Internally Flawless (IF), through the VVS, VS and SI categories, to Included grades. The precise grade depends on the grading system applied and the combined assessment of relevant characteristics.

Although size is important, clarity grading is not determined by a simple calculation of inclusion diameter divided by the diamond’s dimensions. Instead, the grader evaluates the characteristics of the inclusion in the context of the individual stone.

Important considerations include:

• Size: The dimensions and apparent extent of the inclusion.
• Position: Where the inclusion is located within the diamond.
• Nature: The type, shape, structure and visual characteristics of the inclusion.
• Relief and contrast: How distinctly the inclusion stands out against its surrounding optical environment.
• Number and distribution: Whether there is one isolated feature or a number of inclusions distributed throughout the stone.
• Overall effect: The combined influence of these characteristics on the diamond’s appearance under the prescribed grading conditions.

These factors interact. An inclusion that is relatively inconspicuous in one diamond may be considerably more apparent in another, even where their measured dimensions are similar.

For further information, see DCLA’s Diamond Clarity Guide and Four Cs of Diamond Grading.

2. The influence of diamond shape and facet arrangement

The optical behaviour of a diamond is influenced by its cut style, proportions, facet arrangement and the conditions under which it is observed.

A round brilliant diamond has numerous facets arranged to produce characteristic patterns of brightness, contrast and scintillation. These changing patterns can make an inclusion less apparent in some viewing positions while making it more conspicuous in others.

By comparison, a step-cut diamond, such as an emerald cut, generally has larger, elongated facets arranged in parallel rows. This produces a different optical appearance, often described as a hall-of-mirrors effect.

The distinction is important because the same inclusion may appear differently in the two cuts. A small inclusion can be masked by the complex light and dark patterns of a brilliant cut, yet stand out more clearly against the relatively broad facets of a step cut.

However, this is not an absolute rule. An inclusion may be highly visible in a brilliant cut if it creates strong contrast or occupies a prominent position. Likewise, a step-cut diamond may conceal an inclusion under certain viewing conditions.

The relevant principle is that inclusion visibility depends on the interaction between the inclusion and the diamond’s optical environment, not solely on its physical dimensions.

3. Why the position of an inclusion matters

The location of an inclusion can substantially influence its apparent visibility and its contribution to the final clarity grade.

Beneath the table

The table is the large central facet on the crown of a typical brilliant-cut diamond. An inclusion positioned beneath the table may be readily visible when the diamond is viewed face-up, particularly if it is dark, sharply defined or surrounded by a contrasting facet pattern.

A centrally located inclusion is not automatically more serious than one elsewhere. Its actual impact depends on its dimensions, nature, contrast and visibility under grading conditions.

Within the crown region

Inclusions beneath the crown facets may interact with the diamond’s changing patterns of brightness and darkness. Depending on their position and contrast, they may be conspicuous from certain viewing angles and less apparent from others.

At or near the girdle

The girdle is the perimeter separating the crown from the pavilion. An inclusion close to this region may be less apparent when the diamond is viewed face-up, depending on its depth, orientation and relationship to the surrounding facets.

Some inclusions near the girdle may nevertheless be readily visible from the side or at particular viewing angles. Their location does not automatically justify a higher or lower clarity grade.

Within the pavilion

The pavilion is the lower portion of the diamond beneath the girdle. Inclusions located in this region can interact with reflected light and facet patterns in complex ways.

A pavilion inclusion may appear to have multiple visual counterparts because of internal reflections. These apparent repetitions are optical effects rather than necessarily separate inclusions.

The visibility of a pavilion inclusion therefore depends on its location, orientation, contrast and the optical behaviour of the stone.

At the culet

The culet is the small facet, or point where no culet facet is present, at the bottom of the diamond. An inclusion or other characteristic in this region may be influenced by the surrounding pavilion facets and viewing angle.

As with other positions, its contribution to clarity must be assessed in the context of the complete diamond.

These examples demonstrate why location is a significant part of clarity grading, but cannot be evaluated independently of the other grading factors.

For terminology relating to diamond structure and facet arrangement, consult the DCLA Diamond Glossary and Picture Library.

4. The nature of an inclusion

The term inclusion covers a broad range of internal features. Their appearance and optical effect can vary substantially, even when their dimensions are similar.

Dark mineral or crystal inclusions

Dark inclusions may create strong visual contrast against a bright facet. Their apparent prominence depends on their size, location, shape and the lighting and viewing conditions.

Light or colourless inclusions

Some inclusions are relatively light in appearance and may blend into their surroundings. Others become conspicuous when positioned against a dark facet or when their boundaries scatter or interrupt light.

Clouds

A cloud is a grouping of very small inclusions that may collectively create a hazy or diffuse appearance. Individual components can be difficult to resolve, particularly at lower magnification, while their combined effect may be more apparent.

The grading significance of a cloud depends on its density, distribution, extent and visual effect.

Pinpoints and minute crystals

Very small inclusions may be difficult to identify individually. When present in groups, however, they can contribute to a cloud-like appearance or affect the diamond’s overall visual character.

Internal graining and twinning wisps

Internal graining may appear as lines or bands associated with irregularities in the diamond’s crystal structure. Twinning wisps are a particular type of internal feature associated with twinning planes and may appear as fine, thread-like or cloud-like patterns.

These characteristics should not be confused with a simple description of unbonded carbon. Their precise nature must be established through appropriate gemmological examination.

Feathers and fractures

A feather is a feather-like internal fracture or break, often with a light appearance under certain viewing conditions. In the diamond trade, the term gletz is also used for certain fracture-like features.

The significance of a feather depends on its size, position, visibility and other characteristics. Its potential effect on durability is a separate consideration from its contribution to clarity grading.

The DCLA Diamond Clarity Guide provides further information about clarity characteristics and their role in grading.

5. Contrast: Why some inclusions are more visible than others

Contrast is an important consideration when evaluating the apparent visibility of an inclusion.

A well-cut diamond viewed face-up naturally displays alternating bright and dark areas. These patterns are part of its optical behaviour and are influenced by the diamond’s facet arrangement, proportions, lighting and viewing position.

An inclusion that appears dark against a bright facet may be particularly conspicuous. Similarly, a light inclusion against a dark facet can produce strong contrast and become readily identifiable.

Conversely, an inclusion may be less apparent when its appearance closely resembles that of the surrounding area.

Consider a hypothetical example: a dark inclusion in a diamond initially assessed as VS2 may become sufficiently prominent under the applicable grading conditions to support an SI1 grade. Conversely, a less conspicuous inclusion in a different position may have a smaller effect on the final assessment.

These examples are illustrative, not automatic grading rules. A grade cannot be changed solely because an inclusion is black, white, central or close to the girdle. The complete set of grading criteria must be considered.

This is one reason clarity grading requires trained observation and consistent application of established standards rather than a simple measurement of inclusion size.

6. Clouds and the distinction between clarity and transparency

An important distinction in diamond assessment is the difference between clarity and transparency.

Clarity evaluates the diamond’s internal and external characteristics according to the relevant grading methodology.

Transparency concerns the degree to which light can pass through the material without significant obstruction, haze or cloudiness.

A diamond can have a recognised clarity grade yet exhibit a degree of internal cloudiness that affects its transparency. Conversely, a diamond containing inclusions may still display very good or excellent transparency.

For example, a diamond graded VS2 may contain a dispersed cloud of microscopic features. Depending on the cloud’s density, distribution and optical effect, the stone may show a degree of haze even though individual inclusions are difficult to distinguish.

The relationship is not automatic: a cloud does not necessarily reduce transparency, and a lower clarity grade does not necessarily indicate poor transparency.

Magnification and lighting can also change how internal features are observed. A cloud may be difficult to resolve as separate inclusions under a standard 10× loupe yet appear more evident under a microscope or under particular illumination. This does not, by itself, establish a lower clarity grade. The grading assessment must follow the relevant examination procedure.

The important point is that clarity and transparency describe related but different properties. Neither should be used as a substitute for the other.

7. The DCLA Transparency Grading System

DCLA developed its Transparency Grading System to provide additional information about a diamond’s optical characteristics beyond its conventional quality grades.

The system assesses the degree of transparency and the extent to which haze, cloudiness or other internal features interfere with light transmission. This information can help distinguish between diamonds that share a similar clarity grade but have different transparency characteristics.

DCLA’s published transparency scale comprises five categories:

• Excellent: Completely transparent, with no significant haze or cloud affecting transparency.
• Very Good: Transparent, with minimal light interruption and only very slight haze or cloud.
• Good: Transparent, with slight detectable haze or cloud.
• Medium: Semi-transparent, with marked light interruption and more readily detectable haze or cloud.
• Poor: Semi-transparent, with substantial haze or cloud and very limited light transmission.

The assessment of transparency complements rather than replaces clarity grading. It offers additional context for understanding a diamond’s visual performance.

For the background to this approach, read DCLA’s Transparency Grading System.

8. Cut, brilliance and the overall assessment of a diamond

Clarity is only one aspect of diamond quality. The diamond’s cut and proportions influence how light interacts with its facets and contributes to its visual appearance.

Brilliance describes the return of white light, while fire refers to the dispersion of white light into spectral colours. Scintillation describes the flashes of light and dark that occur as the diamond, light source or observer moves.

These optical effects are influenced by cut quality, proportions, symmetry, polish and viewing conditions. Internal characteristics can also affect appearance, but clarity alone does not determine a diamond’s brilliance or fire.

A diamond with a high clarity grade may still have limited optical performance if its proportions or facet arrangement are unfavourable. Similarly, a diamond with a lower clarity grade may exhibit attractive brilliance and fire if its cut and transparency are favourable.

For this reason, a complete assessment should consider the diamond’s relevant characteristics together rather than treating any single grade as a definitive measure of overall beauty.

DCLA’s Diamond Grading Process explains the laboratory’s assessment of weight, measurements, colour, clarity, cut, polish, symmetry and transparency.

Conclusion: Understanding the complete diamond

Diamond clarity is a multifactorial assessment. Inclusion size matters, but its significance depends on the feature’s position, nature, contrast, number and distribution, together with the applicable grading methodology.

The optical characteristics of the diamond influence how inclusions appear, while clouds and other microscopic features may affect transparency in ways that are not fully expressed by a clarity grade alone.

DCLA’s approach recognises the value of assessing these characteristics separately. By combining conventional diamond grading with an additional transparency assessment, the laboratory provides a more comprehensive description of the stone.

For jewellers, diamond professionals and consumers, understanding the difference between clarity and transparency helps create a more informed interpretation of a diamond grading report.

Explore more diamond education resources: Diamond Clarity | Four Cs of Diamond Grading | Diamond Grading Reports | Diamond Glossary and Picture Library

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DCLA Diamond Glossary: Clarity and Transparency

The following glossary can accompany this article and link readers to relevant entries in the DCLA Diamond Glossary and Picture Library.

Blemish: An external characteristic or mark on the surface of a polished diamond.

Brilliance: The appearance of white light returned by a diamond.

Cloud: A grouping of minute inclusions that may collectively create a diffuse or hazy appearance.

Clarity: The assessment of a diamond’s internal inclusions and external blemishes under the applicable grading methodology.

Contrast: The visual difference between an inclusion and its surrounding optical environment, which can influence its apparent visibility.

Crown: The upper portion of a polished diamond, extending from the girdle to the table.

Culet: The small facet, or point where no culet facet is present, at the bottom of a diamond.

Facet: A polished, flat surface on a cut diamond.

Feather: A feather-like internal fracture or break within a diamond.

Fire: The dispersion of white light into spectral colours as it passes through a diamond.

Girdle: The perimeter of a polished diamond separating the crown from the pavilion.

Inclusion: An internal characteristic within a diamond, such as a crystal, cloud, feather or internal graining feature.

Pavilion: The lower portion of a polished diamond, extending from the girdle towards the culet.

Scintillation: The flashes of light and dark observed as a diamond, light source or observer moves.

Step cut: A cutting style characterised by rows of elongated facets, commonly found in emerald-cut diamonds.

Table: The large upper facet of a typical brilliant-cut diamond.

Transparency: The degree to which light passes through a diamond without significant obstruction from haze, cloudiness or other internal features.

Twinning wisps: Fine, thread-like or cloud-like internal features associated with twinning planes within the diamond’s crystal structure.

VVS, VS, SI and Included: Categories within commonly used diamond clarity grading scales, representing different levels of inclusion visibility and significance under the applicable grading criteria.

Related DCLA resources

• Diamond Clarity Guide
• Diamond Grading Process
• DCLA Transparency Grading System
• Diamond Glossary and Picture Library
• Diamond Grading Report