Monday, 23 February 2026

How to Clean a Diamond Ring at Home – Expert Advice from DCLA Diamond laboratory

How to Clean a Diamond Ring at Home

Has your engagement ring lost its brilliance? Don’t worry—your diamond hasn’t lost its sparkle. It simply needs professional guidance and proper care.

According to Michael Cohen, DCLA’s diamond cutting and polishing expert at the Diamond Certification Laboratory of Australia, diamonds can maintain their brilliance for thousands of years. However, everyday wear allows oils, soap residue, dust and environmental grime to accumulate on the surface, temporarily dulling the stone’s fire and scintillation.

“Diamonds are the hardest natural substance on earth, ranking 10 on the Mohs scale,” explains Michael Cohen. “They don’t lose their sparkle permanently. What happens is a build-up of residue that blocks light from entering and reflecting properly through the facets.”

The good news? A careful home clean can safely restore that brilliance.


Why Diamond Rings Lose Their Sparkle

Michael Cohen explains that daily exposure to skin oils, moisturisers, cosmetics, and dust causes a film to form on both the diamond and its setting. Over time, this build-up reduces light performance — the very element that makes a diamond appear lively and brilliant.

Regular maintenance prevents this dulling effect and keeps your diamond performing as it was originally cut to do.


Can You Clean a Diamond Ring at Home?

Yes — and you should.

“Routine at-home cleaning helps maintain optimal light return between professional inspections,” says Michael Cohen. “However, it must be done correctly to avoid damage to the setting.”

While home cleaning maintains appearance, annual professional inspections remain essential to ensure the security of the stones and integrity of the setting.


Safe DIY Cleaning Methods Recommended by Michael Cohen

1. Warm Water and Mild Dish Soap (Safest Method)

This is the preferred and safest home-cleaning method.

Steps:

  • Mix warm (not hot) water with a drop of mild dishwashing liquid.
  • Soak the ring for 15–20 minutes.
  • Gently brush around the diamond and setting using a soft toothbrush.
  • Rinse thoroughly in clean water.
  • Pat dry with a lint-free cloth.

“This method effectively removes oil and debris without compromising the metal or diamond,” says Cohen.


2. Warm Water and Glass Cleaner Solution

A diluted glass-cleaner solution (three parts water to one part ammonia-based glass cleaner) can assist in breaking down heavier residue.

However, Michael Cohen cautions:
“Use sparingly and avoid frequent exposure, particularly with white gold or treated metals.”


3. Warm Water and Isopropyl Alcohol

Mix one part rubbing alcohol with three parts warm water and soak the ring for approximately 10 minutes. This helps dissolve oils efficiently.

Rinse thoroughly and dry completely before wearing.


Jewellery Cleaning Products

There are commercial jewellery cleaners available, but Michael Cohen recommends using simple household solutions unless advised otherwise by a professional jeweller.

“Overly aggressive commercial cleaners can sometimes affect delicate settings, especially pavé work.”


Common Mistakes to Avoid

Using Harsh Chemicals

Avoid bleach, chlorine, and strong household cleaners. These can damage metal alloys and weaken prongs.

Scrubbing Aggressively

Hard brushing can loosen claws and dislodge smaller accent stones.

Cleaning Over an Open Sink

Always clean over a bowl or with the sink plug in place to prevent loss.

Using Ultrasonic Cleaners on Pavé or Delicate Settings

Ultrasonic machines can loosen small stones in pavé or micro-set jewellery.

“Ultrasonic cleaners are effective but should be used under professional supervision, especially with intricate designs,” advises Cohen.


Special Care for Mixed Gemstone Rings

If your ring includes pearls, emeralds, opals, or other delicate gemstones, do not use standard cleaning solutions without professional advice.

“Some gemstones are porous or treated. They require specialised care,” says Michael Cohen.


Silver Bands Require Different Treatment

While gold and platinum respond well to soap-and-water cleaning, silver may require polishing solutions or a silver-specific cleaning cloth to restore its shine.


How Often Should You Clean Your Ring?

Michael Cohen recommends cleaning your engagement ring every two to four weeks, depending on wear.

“If you wear your ring daily, regular light cleaning prevents heavy build-up and maintains maximum brilliance.”


When to See a Professional

Even with proper at-home care, professional inspection is critical.

At least once a year, have your ring professionally cleaned and checked for:

  • Loose stones
  • Worn prongs
  • Metal fatigue
  • Structural integrity

“If you ever hear or feel movement in the stone, seek professional attention immediately,” advises Cohen. “A loose diamond can be lost far more easily than people realise.”


How to Keep Your Diamond Cleaner for Longer

Michael Cohen suggests:

  • Removing rings during cooking, gym sessions, gardening, or beach visits.
  • Avoiding contact with sunscreen and heavy moisturisers.
  • Storing rings safely when not worn.
  • Using small ring trays at home to encourage proper habits.

“Mindful wear dramatically reduces build-up and preserves the craftsmanship of the setting.”


Final Word

“Your diamond was cut to perform with precision and brilliance,” says Michael Cohen of the Diamond Certification Laboratory of Australia. “Proper cleaning allows light to enter and exit the stone as intended, restoring its fire, brilliance and life.”

With correct care and periodic professional inspection, your diamond ring will continue to shine for generations.

Sunday, 22 February 2026

De Beers Reports $511 Million Loss as Global Diamond Crisis Deepens

 The global diamond industry is facing its most severe downturn in decades, with De Beers posting a staggering $511 million EBITDA loss for 2025

The global diamond industry is facing its most severe downturn in decades, with De Beers posting a staggering $511 million EBITDA loss for 2025 — a dramatic collapse that underscores mounting structural pressures across the natural diamond market.

Despite generating approximately $3.5 billion in revenue, profitability deteriorated sharply, highlighting a widening disconnect between stable turnover and collapsing margins. The downturn reflects a perfect storm of falling realised prices, swelling inventories, rising operational costs and intensifying competition from laboratory-grown alternatives.

This historic loss signals more than a cyclical slowdown — it marks a structural turning point for the global diamond sector.


Why Did De Beers Record a $511 Million Loss?

The scale of the financial decline is unprecedented. The company’s EBITDA performance deteriorated nearly 2,000% year-on-year, shifting from manageable losses into industry-defining deficits.

Key Drivers Behind the Collapse:

  • Lower realised rough diamond prices
  • Inventory accumulation throughout the midstream
  • Production cuts impacting fixed-cost absorption
  • Asset impairment charges reflecting weaker long-term pricing assumptions

While revenues remained broadly stable, margins compressed dramatically — revealing that demand weakness is affecting pricing power rather than transaction volume alone.


Production Cut by 12% as Supply Is Calibrated

In response to deteriorating market conditions, rough diamond production was reduced by 12% to 21.7 million carats in 2025.

Unlike gold or oil markets where production cuts can rapidly rebalance supply, the diamond sector operates through a complex value chain involving mining, cutting, polishing and retail distribution. Inventory build-ups in 2025 forced disciplined output reductions designed to:

  • Preserve cash flow
  • Prevent further price collapse
  • Protect long-term reserve value
  • Stabilise global supply

However, elevated stockpiles remain a major overhang for 2026.


Lab-Grown Diamonds Accelerate Structural Disruption

Laboratory-grown diamonds continue gaining market share, particularly in engagement rings — historically the most valuable segment of natural diamond demand.

These synthetics are chemically identical but typically sell for 60–80% less than natural stones.

Competitive Advantages of Lab-Grown Diamonds:

  • Lower retail prices
  • Ethical and environmental positioning
  • Consistent quality
  • Rapid scalable production

Millennial and Gen Z buyers are demonstrating increased price sensitivity and different value priorities compared with previous generations — a demographic shift that is reshaping long-term demand dynamics.


China’s Luxury Slowdown Hits Diamond Demand

China, once a powerful growth engine for premium diamond jewellery, is experiencing reduced luxury consumption.

Key contributing factors include:

  • Slower GDP growth
  • Property market weakness
  • Lower consumer confidence
  • Currency sensitivity to imports

With Chinese buyers representing a significant share of high-end global diamond demand, the slowdown is having a disproportionate impact on producers.


US Tariffs Disrupt Indian Diamond Processing Hub

Trade policy has compounded the crisis. India processes roughly 80% of the world’s rough diamonds, and new US tariffs on Indian polished stones have created additional cost pressures and uncertainty.

The impact includes:

  • Higher landed costs for US-bound diamonds
  • Supply chain bottlenecks
  • Planning uncertainty
  • Competitive distortions

Even if tariff relief emerges later in 2026, industry participants remain cautious about near-term recovery.


Anglo American Takes $2.3 Billion Impairment

Parent company Anglo American recognised a $2.3 billion impairment related to its diamond division, reflecting revised long-term price expectations.

This writedown signals a structural reassessment of the sector rather than a temporary cyclical dip.


African Economies Feel the Pressure

Diamond-producing nations such as Botswana face heightened economic vulnerability. Diamond revenues contribute substantially to:

  • Government income
  • Foreign exchange earnings
  • Employment
  • GDP

Production discipline across Southern Africa reflects both market necessity and economic sensitivity.


What Happens Next? Recovery Scenarios for 2026–2028

Industry forecasts suggest cautious optimisation in 2026, with gradual recovery potentially emerging through 2027–2028.

Key variables include:

  • Inventory normalisation
  • Stabilisation of Chinese demand
  • Trade policy resolution
  • Lab-grown market share plateau

However, structural competition from synthetic diamonds is likely permanent, meaning natural diamond producers must reposition strategically.


What This Crisis Reveals About Luxury Commodity Markets

The diamond downturn highlights broader lessons for luxury commodities:

  • High income elasticity creates sharp downturn risk
  • Supply chains concentrated in single regions amplify vulnerability
  • Technological disruption can permanently reshape pricing structures
  • Inventory cycles in opaque markets create extended recovery timelines

Unlike transparent commodities such as gold, diamond pricing lacks a centralised exchange — increasing volatility during stress periods.


Investment Perspective

For long-term investors, sector distress can present contrarian opportunities — but risks remain elevated.

Favourable characteristics may include:

  • Low-cost producers
  • High-grade deposits
  • Strong balance sheets
  • Vertical integration

Nevertheless, structural shifts in consumer preference require careful risk-adjusted evaluation.


Disclaimer: This article is for informational purposes only and does not constitute financial advice. Commodity investments carry substantial risk, including potential loss of capital. Readers should conduct independent research and consult qualified financial professionals before making investment decisions.


DCLA News will continue monitoring developments in the global diamond sector as the industry navigates one of the most challenging periods in modern history.

Thursday, 19 February 2026

Slight Slip for India's Polished Exports

 India's polished diamond exports dipped by 3.6 per cent year-on-year in January, following on from modest growth (+2.7 per cent) in December 2025, and a 38 per cent surge in November.The slight dip in January reflects the usual post-holiday pause in demand from US retailers, but that is set against an overall trend towards increased exports.Total foreign sales for January were $979m, according to the latest figures from GJEPC (India's Gem and Jewellery Export Promotion Council), down from $1.01bn in January 2025.The impact of President Trump's 50 per cent tariff on Indian exports appears to have been softened somewhat by manufacturers switching to other markets - notably UAE, Hong Kong, Thailand and Europe.In addition, exporters have benefitted from far fewer return consignments (down from as high as 30 per cent to just 10 per cent), reflecting smarter supply chain tactics.And an easing of US tariffs is likely to improve matters. On 6 February the US scrapped the 25 per cent punitive element of tariffs on India, with immediate effect.It also pledged to bring down the reciprocal tariff to 18 per cent, as part of an Interim Trade Agreement, though this has yet to happen.The GJEPC figures show that India's gross exports of gems and jewelry fell by 5.8 per cent in January, down to $2.2bn.

India’s polished diamond exports dipped by 3.6 per cent year-on-year in January, following on from modest growth (+2.7 per cent) in December 2025, and a 38 per cent surge in November.

The slight dip in January reflects the usual post-holiday pause in demand from US retailers, but that is set against an overall trend towards increased exports.

Total foreign sales for January were $979m, according to the latest figures from GJEPC (India’s Gem and Jewellery Export Promotion Council), down from $1.01bn in January 2025.

The impact of President Trump’s 50 per cent tariff on Indian exports appears to have been softened somewhat by manufacturers switching to other markets – notably UAE, Hong Kong, Thailand and Europe.

In addition, exporters have benefitted from far fewer return consignments (down from as high as 30 per cent to just 10 per cent), reflecting smarter supply chain tactics.

And an easing of US tariffs is likely to improve matters. On 6 February the US scrapped the 25 per cent punitive element of tariffs on India, with immediate effect.

It also pledged to bring down the reciprocal tariff to 18 per cent, as part of an Interim Trade Agreement, though this has yet to happen.

The GJEPC figures show that India’s gross exports of gems and jewelry fell by 5.8 per cent in January, down to $2.2bn.

Source: DCLA

Wednesday, 18 February 2026

Halle Berry Follows Celebrity Trend for Vintage Diamonds

 Halle Berry vintage diamond  engagement ring.

Halle Berry shifted the focus back to vintage diamonds with her latest engagement ring.

The US actress, producer, and former beauty queen showed off her bezel-cut diamond on The Tonight Show Starring Jimmy Fallon, as she confirmed her engagement to the singer/songwriter Van Hunt.

Berry, 59, is the latest celebrity to opt for a vintage stone, following in the well-publicized footsteps of Taylor Swift.

The two rings are, however, starkly different, in style, price and likely influence on the diamond market.

Swift’s engagement ring, presented to her by NFL player Travis Kelce, sparked a huge media buzz last August and has boosted long-term demand for antique cuts by as much as 200 per cent.

The ring featured featuring a large (somewhere between 7 carats and 10-carats) elongated old mine cut diamond in yellow gold designed by Kindred Lubeck.

Berry’s ring has a far smaller center stone (1.5 carat to 3.0 carat) set with dark accent stones – onyx or sapphire – in an 18k yellow gold geometric setting. It is priced in the low hundreds of thousands of dollars, rather than the estimated million or so for Swift.

The trend toward vintage engagement rings reflects a cultural shift that prizes authenticity, personalization, and heirloom appeal over mass-produced modern brilliants.

Berry has been married three times before, to baseball player David Justice (1993-1997), musician Eric Benet (2001-2005), and actor Olivier Martinez (2013-2016). She’s been with Hunt since April 2020.

Source: DCLA

Tuesday, 17 February 2026

What Is a Diamond? Natural vs Laboratory-Grown – Structure, Science and Pricing

 Laboratory-Grown rough diamond

A diamond is a solid form of the element carbon in which the atoms are arranged in a crystal structure known as diamond cubic. In this structure, each carbon atom is bonded to four others in a rigid tetrahedral arrangement (sp³ bonding), forming one of the strongest natural materials known.

In its pure form, diamond is:

  • Colourless
  • Odourless and tasteless
  • Extremely hard
  • A poor conductor of electricity
  • Insoluble in water
  • Chemically inert under most conditions

Although graphite is the stable form of carbon at room temperature and pressure, diamond is metastable and converts to graphite at an almost negligible rate over geological time.


The Physical and Optical Properties of Diamond

Diamond possesses extraordinary properties:

  • Highest hardness of any natural material (Mohs 10)
  • Highest thermal conductivity of any natural substance
  • Extremely high refractive index (~2.42)
  • High optical dispersion, creating the “fire” in gemstones
  • Very low thermal expansion
  • Exceptional chemical resistance
  • High electrical resistance

Because the crystal lattice is extremely rigid, only very small amounts of impurities can enter the structure. These trace elements or structural defects create colour:

  • Nitrogen → Yellow
  • Boron → Blue
  • Crystal defects → Brown
  • Radiation exposure → Green
  • Plastic deformation → Pink, red, purple

How Natural Diamonds Form

Natural mined rough Diamonds


Most natural diamonds are between 1 and 3.5 billion years old.

They formed deep within the Earth’s mantle at depths of 150–250 km, and occasionally as deep as 800 km, under extreme pressure and temperature. Carbon-bearing fluids replaced minerals with crystallised carbon.

They were later transported rapidly to the surface via volcanic eruptions and deposited in igneous rocks known as:

  • Kimberlite
  • Lamproite

Historically, diamonds were first mined in ancient India along the Penner, Krishna and Godavari rivers, and have been known for at least 3,000 years.

The word diamond comes from the Ancient Greek “adámas”, meaning unbreakable or invincible.


The Discovery That Diamond Is Carbon

In 1772, Antoine Lavoisier demonstrated that when a diamond burns in oxygen, it produces carbon dioxide.

Later, in 1797, Smithson Tennant proved that diamond and graphite release the same gas when burned, confirming that both are forms (allotropes) of pure carbon.


Laboratory-Grown Diamonds

Synthetic diamonds are created using two main methods:

1. HPHT (High Pressure High Temperature)

Replicates natural mantle conditions using pressures above 5 GPa and temperatures above 1,300°C.

2. CVD (Chemical Vapour Deposition)

Carbon-rich gases are broken down in a plasma chamber, allowing carbon atoms to deposit layer by layer onto a diamond seed crystal.

Chemically, physically and optically, laboratory-grown diamonds are the same as natural diamonds. Both are pure carbon in the diamond cubic structure.

They are distinguished using advanced gemmological techniques such as:

  • Spectroscopy
  • Growth pattern analysis
  • Inclusion study
  • Thermal conductivity testing

Hardness, Toughness and Durability

Diamond is the hardest known natural material, but it is not indestructible.

  • It has excellent resistance to scratching.
  • It has cleavage planes, meaning it can split if struck in certain directions.
  • Toughness (resistance to breakage) is good for a ceramic but lower than many metals.

Its durability makes it ideal for engagement rings and daily wear jewellery.


Natural vs Laboratory-Grown Diamonds: Pricing Comparison (2026 Market Overview)

Although structurally identical, pricing between natural and lab-grown diamonds differs dramatically due to rarity and supply dynamics.

Natural Diamonds

  • Finite geological supply
  • Mining costs, exploration, labour and environmental compliance
  • Graded and traded based on rarity
  • Price stability linked to long-term scarcity

In today’s market, a high-quality 1.00 carat natural diamond (G colour, VS clarity) typically trades wholesale in the range of USD $4,500–$7,000, depending on cut quality and certification.

Premium stones (D–F colour, IF–VVS clarity) command significantly higher prices.

Laboratory-Grown Diamonds

  • Mass-producible in controlled environments
  • Increasing global production capacity
  • Rapid technological efficiency gains
  • No geological rarity

The same 1.00 carat equivalent (G colour, VS clarity) laboratory-grown diamond now trades between USD $300–$600.

Retail prices decline as production scales.


Why the Price Gap Exists

The key difference is not chemistry — it is rarity and supply economics.

Natural diamonds:

  • Formed over billions of years
  • Limited global deposits
  • High capital-intensive extraction

Laboratory diamonds:

  • Manufactured within weeks
  • Scalable production
  • Compete with industrial cost structures

As production increases, laboratory diamond pricing behaves more like a manufactured product than a rare natural asset.


Investment and Resale Considerations

Natural diamonds retain secondary market value more effectively due to:

  • Limited supply
  • Established global trading networks
  • Long-term historical demand

Laboratory-grown diamonds currently have minimal resale value in secondary markets due to continuous price decline and expanding supply.


A diamond, whether natural or laboratory-grown, is one of nature’s most extraordinary materials — a crystal of pure carbon arranged in a tetrahedral lattice that produces unmatched hardness, brilliance and thermal conductivity.

However, while they are chemically identical, their market dynamics are fundamentally different.

Natural diamonds derive value from geological rarity and billions of years of formation.

Laboratory-grown diamonds derive value from technology, efficiency and accessibility.

Understanding this distinction is essential for anyone buying, selling or investing in diamonds today.

Source: DCLA

How to Clean a Diamond Ring at Home – Expert Advice from DCLA Diamond laboratory

Has your engagement ring lost its brilliance? Don’t worry—your diamond hasn’t lost its sparkle. It simply needs professional guidance and pr...