The Art of Contrast: Why Mixing Coloured Diamonds Creates Extraordinary Jewellery

 

For centuries, white diamonds have been regarded as the ultimate symbol of elegance and timeless beauty. Today, however, the world’s leading jewellery designers are embracing a more artistic approach combining white diamonds with rare coloured diamonds to create striking pieces that are as unique as they are valuable.

From delicate pink diamond halos surrounding a brilliant white centre stone to vivid yellow diamonds framed by soft pink accents, the thoughtful use of contrasting colours can transform an already beautiful diamond into an exceptional work of art.

The result is jewellery that is not only visually captivating but often far more distinctive than traditional all-white diamond designs.

Colour Creates Emotion

The human eye is naturally drawn to contrast.

Artists have understood this for centuries, using complementary colours to create depth, balance and visual impact. Jewellery designers apply the same principles when working with diamonds.

A perfectly colourless diamond surrounded by a halo of natural pink diamonds immediately appears brighter and more vibrant. The soft blush tones create warmth around the crisp white centre stone, producing a romantic and luxurious appearance that cannot be achieved with white diamonds alone.

Similarly, a rich yellow diamond surrounded by pink diamonds creates a dramatic contrast. The warmth of the yellow is enhanced by the cool undertones of the pink, allowing each colour to appear richer and more saturated.

Rather than competing with one another, the colours work together to produce greater visual intensity.

The Rise of Coloured Diamond Combinations

While coloured diamonds have always been prized by collectors, improvements in jewellery design and precision manufacturing have encouraged designers to use them in increasingly creative ways.

Some of today’s most sought-after combinations include:

• A colourless diamond framed by a halo of natural pink diamonds.
• Fancy Yellow diamonds surrounded by Argyle pink diamonds.
• Fancy Intense Yellow centre stones with white diamond halos.
• White diamonds accented with blue or champagne diamonds.
• Pink diamonds paired with white pavé settings.
• Three-stone rings featuring contrasting diamond colours.
• Alternating white and coloured diamonds in eternity bands.

Each combination creates its own personality, allowing jewellery to become an expression of individual style rather than simply following tradition.

Pink Diamonds: Small Stones with Extraordinary Impact

Natural pink diamonds occupy a unique position within the diamond world.

Even very small pink diamonds possess remarkable rarity, particularly those originating from Australia’s now-closed Argyle Mine. Their limited availability has made them highly desirable among collectors and designers alike.

A halo of pink diamonds surrounding a larger white diamond allows jewellers to showcase this rarity without requiring a large pink centre stone.

The effect is remarkable.

The pink diamonds add warmth and sophistication while visually enhancing the brilliance of the colourless centre diamond.

Because the halo consists of numerous carefully matched stones, the overall impression is one of richness and refinement.

Yellow Diamonds Come Alive with Contrast

Yellow diamonds are among the most popular naturally coloured diamonds available today.

When used as the centrepiece of a ring, they radiate warmth and vibrancy. However, surrounding a yellow diamond with carefully selected pink diamonds introduces an entirely new dimension.

The soft pink tones gently frame the yellow centre, making its colour appear deeper and more saturated. At the same time, the yellow diamond provides a striking focal point against the delicate pink border.

Many luxury jewellery houses have embraced this combination because it creates an appearance that is simultaneously elegant, modern and unmistakably distinctive.

More Than Beauty, A Celebration of Rarity

Combining different coloured diamonds is not simply a design trend.

It is often a celebration of rarity.

Natural fancy coloured diamonds account for only a very small percentage of all diamonds recovered worldwide. Finding matching stones with similar colour intensity, clarity and size requires exceptional expertise.

Every carefully matched halo represents countless hours of diamond selection.

The more precisely the colours complement one another, the more harmonious and valuable the finished piece becomes.

The Importance of Colour Matching

Creating a successful coloured diamond design involves far more than selecting attractive stones.

Professional jewellers carefully consider:

• Colour hue
• Colour intensity
• Tone
• Saturation
• Diamond size
• Cut precision
• Overall symmetry

Even slight variations between pink diamonds can affect the appearance of a halo.

Likewise, white accent diamonds must be matched for colour and brilliance to ensure they enhance rather than distract from the centre stone.

This meticulous attention to detail is what separates exceptional jewellery from ordinary jewellery.

Precious Metals Complete the Design

The choice of metal plays an equally important role.

Platinum and white gold enhance the brilliance of colourless diamonds and provide a contemporary appearance.

Yellow gold intensifies the warmth of yellow diamonds while offering a classic, timeless aesthetic.

Rose gold has become increasingly popular for pink diamond jewellery, complementing the delicate blush tones and creating a seamless flow of colour throughout the design.

Some of the most sophisticated creations combine multiple precious metals, allowing each section of the ring to highlight a different coloured diamond.

A New Era of Personal Expression

Today’s clients are increasingly seeking jewellery that reflects their individuality.

Mixing coloured diamonds allows designers to create bespoke pieces that cannot be replicated simply by increasing diamond size or carat weight.

Whether choosing a white diamond embraced by a halo of rare pink diamonds or a radiant yellow diamond accented with white and pink stones, these combinations create jewellery that tells a story through colour, contrast and craftsmanship.

Beauty Enhanced by Contrast

The finest jewellery is rarely about excess it is about balance.

The careful pairing of white, pink and yellow diamonds demonstrates how contrast can enhance brilliance, intensify colour and elevate an already beautiful design into something truly extraordinary.

As coloured diamonds continue to capture the imagination of collectors and jewellery lovers around the world, their thoughtful combination with traditional white diamonds is redefining modern luxury.

When selected with care and expertly matched, contrasting diamond colours do more than create visual impact they create timeless pieces whose beauty lies not only in the rarity of the individual diamonds, but in the harmony they achieve together.

Source: DCLA

World Diamond Day: The Most Valuable Diamonds Ever Sold at Auction

In recognition of World Diamond Day, we reflect on some of the most extraordinary diamonds ever offered at auction stones that not only achieved record-breaking prices but also represent the pinnacle of rarity, craftsmanship, and natural beauty.

Established by the Natural Diamond Council, World Diamond Day celebrates the enduring significance of natural diamonds, highlighting their provenance, emotional value, and the moments they commemorate. It is also an opportunity to examine the exceptional stones that continue to define the upper limits of the global diamond market.

Below is a selection of some of the most important diamonds ever sold at auction.

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The CTF Pink Star

The CTF Pink Star remains the most expensive diamond ever sold at auction. This 59.60 carat oval-shaped, fancy vivid pink diamond achieved US$71.2 million at Sotheby’s Hong Kong in 2017.

Internally flawless and cut from a 132.5 carat rough discovered in 1999, the stone required over two years of meticulous planning and craftsmanship to realise its final form. It was acquired by Chow Tai Fook, setting a benchmark for coloured diamonds globally.

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The Williamson Pink Star

Achieving US$57.7 million in 2022, this 11.15 carat cushion-cut fancy vivid pink diamond is among the finest ever graded.

Originating from a 32.32 carat rough from Tanzania’s Williamson mine, it was classified as internally flawless by the Gemological Institute of America, placing it among the rarest gemstones known.

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The Oppenheimer Blue

This 14.62 carat emerald-cut vivid blue diamond sold for US$57.5 million at Christie’s Geneva in 2016.

Named after its former owner, Sir Philip Oppenheimer, the diamond drew intense global attention and was ultimately secured after a competitive international bidding process.

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The Blue Moon of Josephine

Cut from a 29.62 carat rough discovered in South Africa in 2014, this 12.03 carat fancy vivid blue diamond achieved US$48.4 million at Sotheby’s Hong Kong in 2015.

Purchased by Hong Kong collector Joseph Lau, it was renamed in honour of his daughter, further cementing its place in modern diamond history.

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The Graff Pink

This 24.78 carat fancy intense pink diamond sold for over US$46 million at Sotheby’s Geneva in 2010.

Acquired by Laurence Graff, the stone had not appeared on the market for more than 60 years prior to its sale, adding to its provenance and desirability.

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The Princie Diamond

Selling for US$39.3 million at Christie’s New York in 2013, the Princie Diamond carries remarkable historical significance.

Originating from India’s famed Golconda mines and once owned by the Nizams of Hyderabad, the diamond reflects the rich heritage of some of the world’s most celebrated diamond sources.

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The The Orange

Weighing 14.82 carats, this pear-shaped fancy vivid orange diamond remains the largest of its kind ever recorded.

It achieved US$35.5 million at Christie’s Geneva in 2013, significantly exceeding pre-sale expectations and reinforcing the rarity of orange diamonds.

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The Magnificent Oval Diamond

One of the largest D-colour flawless diamonds ever to appear at auction, this 118.28 carat oval-cut stone sold for US$30.8 million at Sotheby’s Hong Kong in 2013.

Its exceptional colour and clarity grading underscore the importance of strict laboratory standards in determining value—an area where independent certification remains critical.

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A Reflection on Rarity and Value

These diamonds are more than record-breaking assets—they are geological miracles shaped over billions of years and refined through exceptional human skill. Their value lies not only in carat weight or colour grading, but in rarity, provenance, and the precision of their cutting and certification.

As World Diamond Day highlights, natural diamonds continue to occupy a unique position in both the luxury and investment landscape. For laboratories such as the Diamond Certification Laboratory of Australia, the role of accurate and independent grading remains fundamental in preserving confidence and transparency within the global diamond market.

Source: DCLA

3.63-ct “Salt and Pepper” Pink Fails to Sell

The highlight of Sotheby’s Fine Jewelry sale in New York – a rare 3.63-carat fancy vivid purple-pink diamond failed to find a buyer.

The unmounted, cut-cornered rectangular modified brilliant-cut stone carried a pre-auction estimate of $1m to $1.5m , reflecting both its unusual color and its potential appeal to collectors.

But bidding at the auction, on 11 December, stalled below the consignor’s undisclosed reserve, leaving the stone unsold.

Market observers suggested that bidders were likely deterred by the diamond’s noticeable “salt and pepper” inclusions, which significantly affected its clarity.

The Gemological Institute of America (GIA) graded the stone as I2 clarity, raising concerns about transparency and overall visual appeal.

Observers say buyers in today’s cautious high-end market are increasingly unwilling to compromise on clarity, particularly for unmounted stones, where inclusions are more apparent, even when the color is considered rare and desirable.

Source: DCLA

31-Carat ‘Desert Rose’ Diamond Expected to Fetch $7 Million at Abu Dhabi Auction

Sotheby’s is set to showcase one of the world’s rarest diamonds during its upcoming series of luxury auctions and exhibitions in Abu Dhabi, held from 2 to 5 December at The St. Regis Saadiyat Island Resort. The events form part of Abu Dhabi Collectors’ Week, which will feature masterclasses, panel discussions, and curated exhibitions highlighting fine jewellery, timepieces, collector cars, luxury real estate, and other exceptional assets.

The highlight of the auction is “The Desert Rose”, a 31.86-carat fancy vivid orangy-pink diamond, the largest of its kind ever graded. This extraordinary pear-shaped gem—first unveiled in Sotheby’s “Beyond: The World’s Rarest Diamonds” exhibition earlier this year—makes its auction debut with an estimated value of USD $5–$7 million.

The timing of the event coincides with one of Abu Dhabi’s busiest weeks, which includes the Formula 1 Grand Prix, the Milken Institute Middle East and Africa Summit 2025, Abu Dhabi Finance Week, and Bitcoin MENA. Together, these prestigious gatherings are expected to attract a global audience of collectors, investors, and cultural leaders.

Following Sotheby’s successful inaugural sale in Saudi Arabia earlier this year, the Abu Dhabi auctions further underscore the Middle East’s growing influence in the global luxury and cultural landscape. Saadiyat Island, home to institutions such as the Louvre Abu Dhabi, the forthcoming Guggenheim Abu Dhabi, and the Zayed National Museum, continues to establish itself as a world-class destination for art and high-value collectibles.

The Desert Rose diamond’s debut marks a milestone in coloured diamond history—its rarity, hue, and size exemplify the exceptional standards that define the world’s most coveted gems.

— DCLA News Team

$20 Million ‘Glowing Rose’ Pink Diamond to Headline Sotheby’s Geneva Auction

A rare 10.08-carat fancy vivid pink diamond ring, named The Glowing Rose, is set to take centre stage at Sotheby’s upcoming High Jewellery sale in Geneva on 12 November. Expected to achieve around USD 20 million, the stone represents one of the most important pink diamonds to reach the auction block in recent years.

This exceptional cushion brilliant-cut diamond crafted by luxury jeweller Boodles originates from a 21-carat rough unearthed in Angola in 2023. Its vivid, pure pink hue and balanced proportions exemplify the rarest qualities of natural fancy coloured diamonds. According to Sotheby’s, it is only the third cushion cut vivid pink diamond over 10 carats to appear at auction within the past decade.

The cushion cut, recently popularised by Taylor Swift’s engagement ring, has become increasingly sought after among collectors for its romantic and timeless appeal.

Sotheby’s has a strong record of achieving exceptional results for vivid pink diamonds. In 2022, the auction house sold the Williamson Pink Star an 11.15 carat, fancy vivid pink, internally flawless diamond for USD 57.7 million in Hong Kong. The following year, a 10.57 carat vivid purplish-pink diamond fetched USD 34.8 million in New York. Earlier this year, Sotheby’s Geneva achieved USD 21.5 million for the Mediterranean Blue, a 10.03-carat fancy vivid blue diamond.

“With the continued global demand for rare coloured diamonds, we are delighted to present The Glowing Rose,” said Jessica Wyndham, Head of High Jewellery at Sotheby’s Geneva. “Following the remarkable success of the Mediterranean Blue, this sale offers collectors another extraordinary opportunity to acquire a truly exceptional gem.”

Before its appearance in Geneva, The Glowing Rose will be showcased in Singapore and Taipei, giving collectors and connoisseurs a preview of one of the year’s most significant pink diamonds.

DCLA notes that fancy vivid pink diamonds remain among the most coveted and valuable gems in the world, combining extraordinary rarity with strong global demand from collectors and investors alike.

6.95-Carat Pink Diamond to Headline Vanderbilt Family Jewels Auction in Geneva

A spectacular 6.95-carat fancy vivid purplish pink Golconda diamond will lead The Geneva Jewels Auction: V, as Phillips Geneva prepares to offer an extraordinary collection of jewels once owned by the legendary Vanderbilt family, once America’s richest dynasty.

Among the highlights is a Tiffany & Co. 42.68-carat sugarloaf Kashmir sapphire and diamond brooch, estimated at US$1 million to US$1.5 million, alongside a step-cut Kashmir sapphire and diamond ring weighing 18.09 carats (estimate US$2.2 million to US$2.8 million). The sale also features a stunning pair of brilliant-cut diamond ear studs, weighing 8.00 and 8.28 carats, both graded D colour, VVS1 clarity, with an estimate of US$600,000 to US$850,000.

The Vanderbilt name is synonymous with immense wealth and American industrial power. The family’s fortune began with Cornelius Vanderbilt, who, at age 16, borrowed $100 from his mother to start a ferry service in 1810. He later built a shipping and railroad empire that made him the richest man in the United States, worth about $100 million at his death in 1877 — equivalent to at least $185 billion today.

His son, William Henry Vanderbilt, further doubled that fortune to over $200 million (around $370 billion in today’s terms). However, the family’s wealth gradually dispersed over subsequent generations, with the combined net worth of the Vanderbilt descendants now estimated at around $200 million.

The Geneva Jewels Auction: V, featuring The Vanderbilt Family Jewels, will take place on 10 November at Phillips Geneva, marking a rare opportunity for collectors to acquire pieces linked to one of America’s most storied families.

Source: DCLA

Rare purple diamond unearthed at Diavik

Vibrant 0.45-carat gem adds final flourish to Diavik’s closing years.
Just when it seemed Diavik had given all it could give, a rare purple diamond has been unearthed at the Northern Canadian mine – a 0.45-carat stone that stands out in a region better known for producing predominantly colorless gems and the occasional yellow stone, adding a splash of unexpected color as the operation approaches the final years of its mine life.

The discovery, quietly announced by Rio Tinto via social media, comes just weeks after the recovery of a 158.2-carat yellow diamond and a 50-million-year-old petrified log – both of which drew attention to the remarkable geological and historical treasures still surfacing from the remote subarctic site.

“We recently had a unique discovery at Diavik – a rare purple diamond weighing in at 0.45 carats,” the company wrote in a social media post on LinkedIn.

“Diavik diamonds are typically white, so this came as a pleasant surprise,” the post continued. “The purple colour likely comes from a trace element such as hydrogen or a twist in the crystal lattice structure of the diamond. The shape of the rough diamond is known as a ‘makeable’ which means it will likely be cut into a single diamond.”

Though small in size, the stone is striking for its rarity, with colored diamonds of any kind making up less than 1% of Diavik’s total production over more than two decades of operation.

Among them, purple diamonds are the rarest, their distinctive hue typically attributed to hydrogen impurities or plastic deformation deep in the Earth’s mantle – a result of the intense pressure and heat that alters the crystal structure during formation.

In gemological terms, purple diamonds are often classified under the broader category of “fancy color” stones, though few attain the deep saturation necessary for that label. More often, their shades fall within the purplish-pink or violet spectrum, with pure purple standing as one of the most elusive colors in the diamond world.

For Diavik, the recovery of such a specimen near the end of its mine life serves as both a scientific curiosity and a symbolic capstone.

Since beginning production in 2003, the mine has yielded over 140 million carats of rough diamonds – predominantly colorless, with a handful of exceptional yellow stones including the 552-carat “egg” discovered in 2018 and the more recent 158.2-carat find earlier this year.

Yet, while the occasional yellow diamond has offered moments of brilliance, the purple discovery stands out for its singularity.

While not the first purple diamond recovered from Diavik – industry veterans have noted smaller specimens dating back more than a decade – this 0.45-carat stone ranks among the most notable, particularly for its size, clarity, and timing near the end of the mine’s operational life.

Purple diamonds are so rare that only a few notable examples have surfaced globally, often fetching premium prices far beyond their white or even pink counterparts. Their appearance in the trade is sporadic, and their origin even more geographically restricted – making a Canadian purple diamond an especially uncommon occurrence.

Diavik’s purple gem is expected to be cut into a single polished stone, though no details have been released about where it might end up – in private hands, a high-profile auction, or perhaps a Canadian institution.

Whatever its path, the find adds a final chapter to Diavik’s legacy – a small but vibrant reminder that even in its twilight, the remote Arctic mine remains full of surprises.

Source: DCLA

See The World’s Rarest Diamonds, Worth a Total of $100 million, in Abu Dhabi

Sotheby’s, in partnership with the Abu Dhabi Investment Office, is exhibiting extremely rare coloured diamonds at Bassam Freiha Art Foundation this week, in the biggest showcase of diamonds outside of the Smithsonian Museum in Washington DC.

All together, the spectacular diamonds are worth around $100 million. The largest flawless diamond in the world, the largest vivid orangey pink diamond ever graded, the second largest red diamond known to exist and several diamonds over 100 carats are included in the collection, which will be available for public view this Wednesday, April 9 and Thursday, April 10.

“The exhibition is incredibly exciting for the simple reason that to purely just have eight diamonds of this calibre in the same room is something that is worthy of one of the great museums in the world, and I can’t imagine that we will ever see this array together again,” says Paul Redmayne, Sotheby’s senior vice president for luxury private sales. “It is definitely a career highlight for me to see these stunning gemstones side by side, and I look forward to no doubt witnessing many a jaw drop as the public come through the doors.”

The star of the showcase is none other than The Mediterranean Blue. Weighing 10.03 carats, this Fancy Vivid Blue rarity has earned the highest GIA colour grading and a coveted Type IIb classification, an elite status held by less than 0.5 per cent of diamonds. Its cushion cut intensifies its liquid-like saturation, an electrifying depth that feels almost surreal. With an estimated value of $20 million, The Mediterranean Blue will be the highlight of Sotheby’s High Jewellery Sale on May 13 in Geneva.

“The Mediterranean Blue diamond on its own is an incredibly rare stone, and ticks so many of the boxes that you could look for: it is a connoisseur’s diamond, whilst also being infinitely wearable,” shares Redmayne. “The depth of the blue is unrivalled, and even to someone who knows nothing about diamonds, it’s clear to see what makes it so special.”

The diamond is a timeless symbol of love, power, beauty and status – but a captivating collection of this stature is awe-inspiring at an entirely different level; a once-in-a-lifetime experience in the UAE’s capital city, which Redmayne says marks an incredibly exciting moment in the city’s history. “This project further enriches the dynamic landscape of Abu Dhabi for both collectors and the general public,” he says.

Source: voguearabia

Petra’s entire interest in Williamson headed for Tanzania’s Pink Diamonds

An agreement has been entered into for the outright sale of Williamson Diamonds Limited, Petra Diamonds announced on Wednesday.

The London-listed and South Africa-active Petra is taking steps to sell its entire shareholding in the Tanzanian entity to Pink Diamonds Investments for a headline consideration of up to $16-million.

This follows Petra’s sale in May of just under half of the asset, in which the Tanzanian government has a stake, for $15-million via long-term technical services contractor Taifa Mining.

Since then, Williamson’s coming under consolidated ownership has emerged increasingly as the preferred way forward.

As a Taifa affiliate, Pink Diamonds is viewed by Petra CEO Richard Duffy as possessing the technical and financial capability to conduct operations in a responsible manner for all stakeholders.

As a wholly Tanzanian-owned company with more than three decades of mining-related experience, Taifa’s working relationships extend to mining majors such as De Beers, Barrick and AngloGold Ashanti. It is now entering a phase of exclusive ownership of the asset where about 1 100 people are employed, most of them Tanzanian.

The mine’s reserves and resources as of June 30 were reported as 37.17-million carats. With liquidity challenges continuing, further capital investment will be required.

“We look forward to working closely with the Mining Commission, the Fair Competition Commission, employees, community representatives and other key stakeholders in completing the sale as soon as possible,” Duffy stated in a stock exchange announcement accessed by Mining Weekly.

In South Africa, Petra operates the Cullinan diamond mine in Gauteng and the Finsch diamond mine in the Northern Cape.

“We’re committed to adopting and adhering to the latest internationally recognised standards throughout all aspects of our business,” said Pink Diamonds chairperson Rostam Azizi, whose family are from the area around Mwadui, the other name for the Williamson mine, which is situated 23 km north-east of Shinyanga in northern Tanzania.

Mining Weekly can report that the discovery of the kimberlite pipe by Canadian geologist John Williamson in 1940 led to ongoing operation since then, making it one of the world’s oldest continuous operating diamond mines. Its yield of 19-million-plus diamond carats includes the 54.5 ct Williamson pink diamond presented to British royalty in 1947.

Source: DCLA

Red and Pink Diamonds Lead Sotheby’s Sale

A 16.73 carat very light pink diamond is expected to sell for CHF 1.1m to CHF 1.8m ($1.3m to $2m) in Sotheby’s Geneva Magnificent Jewels Sale.

Another highlight of the sale, which features many colored diamonds, is a 1.44 carat fancy red diamond (the rarest of all diamond colors) from Australia’s iconic Argyle mine.

They’ll be offered for sale next week (13 November) in a live auction of 88 lots, including pieces by Cartier, Van Cleef & Arpels, Tiffany, Bulgari and JAR, spanning 250 years of jewelry history.

The pink diamond is claw-set in a ring, VVS1-clarity, natural color with a brilliant cut. The red diamond is also claw-set in a ring, with a cut-cornered rectangular mixed cut, together with an Argyle mine presentation case.

“The sale is a celebration of exceptional craftsmanship, with signed jewels from the most esteemed makers of the 20th century,” says Sotheby’s. The sale also offers a number of coloured diamonds of outstanding quality and size, within the rarest of colors.”

Source: IDEX

Perth Mint continues luxury diamond coin series with turtle

The Perth Mint continues its Jewelled series of coins with a 10 ounce gold Jewelled Turtle coin with a mintage of eight coins.

And it comes with a price tag of $269,000 Australian ($182,229 U.S.).

This is the seventh release in the Jewelled series. It features a handset rare trademarked Argyle Pink Diamond and lustrous white diamonds that form the head and limbs of the three dimensional 18 karat gold turtle.

Each Jewelled Turtle coin is a Proof 10 ounce .9999 fine gold $2,500 denominated coin, with the centerpiece the 18-karat gold sea turtle surrounded by depictions of coral and dory fish.

The turtle’s head and limbs are embellished with 52 white diamonds, and two emeralds for its eyes. Additional white diamonds are set in a ribbon shaped line symbolizing the sea surface, with an Argyle Pink Diamond set at the heart of a stylized sun.

The Jewelled Series is developed each year in association with John Glajz, a Singapore based Argyle Pink Diamonds Icon Partner.

Each Jewelled Turtle coin is presented in a luxury display case adorned with 18 karat gold furnishings and inset with two Argyle Pink Diamond.

For the first time in the series, the coin bears the Dan Thorne effigy of King Charles III, as well as the P125 privy mark for the Perth Mint’s 125th anniversary.

Source: Coinworld