Diversified mining company Rio Tinto’s second Beyond Rare tender has achieved a strong result, underscoring the rarity and unique provenance of the diamonds on offer.
The auction, which featured some of the world’s most coveted natural fancy coloured diamonds, also showcased the continuing global demand for these rare treasures.
The collection, which comprises 76 diamonds across 48 lots, included an exceptional mix of pink, red, and violet diamonds from the now-closed Argyle diamond mine in Australia, as well as white and yellow diamonds from Rio Tinto’s Diavik mine in Canada.
For the first time, the tender also included seven “Old Masters”, notable historic diamonds from the Argyle mine, further elevating the event’s appeal to collectors.
The tender saw successful bids from 12 bidders spanning Australia, Europe, Japan, Hong Kong, the Middle East, Singapore, and North America.
“The continued strong global interest in highly collectible natural coloured diamonds and the resulting value creation, reflects their stature as works of art to be treasured for future generations,” commented Rio Tinto Minerals CEO Sinead Kaufman.
One standout lot, Lot 40, which featured a 4.04-ct pear-shaped pure white diamond from the Diavik mine, alongside two rare pear-shaped violet diamonds from the Argyle mine, was entrusted to Danish luxury jeweller Hartmanns. The company will work with Glajz, an Argyle Pink Diamonds Icon Partner, to create a one-of-a-kind heirloom jewellery piece from these diamonds.
“I am honoured to be creating a jewelled treasure that reflects each magnificent birthplace of these three esteemed diamonds – Argyle in the remote East Kimberley region of Western Australia and Diavik, just below the Arctic Circle on the frozen edge of the earth in Canada’s Northwest Territories,” said Hartmanns owner Ulrik Hartmann.
Rio Tinto’s Argyle diamond mine, which ceased production in November 2020, was the source of nearly entirely the world’s total supply of rare pink and red diamonds. With 37 years of production, Rio Tinto continues to manage the Argyle Pink Diamonds brand, facilitating sales of remaining inventory and collaborating with prominent jewellers globally.
In addition to owning the Argyle Pink Diamonds™brand, Rio Tinto is the majority owner and operator of the Diavik mine in Canada. The company also continues to explore new opportunities in the diamond sector, with a recent joint venture agreement with Endiama, the national diamond mining company of Angola, to explore the Chiri kimberlite in Angola’s Lunda Sul province.
A select few with deep pockets are rolling into Perth to snap up the latest collection of Argyle diamonds, as unsold inventory of the ultra-rare gems whittles down to a “teaspoon”.
A top secret location in the CBD this week will host prospective buyers from Australia and overseas vying for 76 polished pink, red, and other coloured diamonds — predominantly unearthed at Rio Tinto’s shuttered Argyle mine in the east Kimberley region.
Argyle operated for 37 years up until 2020, and about 95 per cent of the world’s circulation of pink and red diamonds can be traced back to the mine.
Each carat of an Argyle pink or red can easily fetch a multi-million-dollar sum. Earlier this year a 1.56ct Argyle red sold for $US4.3 million ($6.4m) in Geneva, equating to $US2.7m a carat. One of the pinks in the latest collection weighs 2.63ct.
But not all of the famed gems sold are destined for an extravagant jewellery piece, with many opting to keep their purchase locked away in a vault as an investment.
“We have seen double digit price growth year on year for the past 20 years . . . and we seeing demand continue unabated for these stones,” Rio Tinto diamond sales and business development manager Michelle Sherring told The West Australian.
“The constrained supply means the value of pink diamonds has eclipsed any kind of comparable equity indices, like the Dow Jones and Hang Seng et cetera, over the years.”
Since mining ceased at Argyle Rio has touted each of its annual tenders for the diamonds as being one of the last.
“We now have a mere teaspoon (of unsold Argyle pinks and reds) remaining within our own inventory,” Ms Sherring said.
Stockpiles are now so low that for the first time ever the collection includes diamonds Rio has bought back from customers.
“Including the secondary market is a new concept for this year, we have very strong relationships with our long running customers,” Ms Sheering said.
“So I approached a handful of them at the beginning of the year in terms of the concept and we have over these years understood where some of the important diamonds sit and which safes they might be held in.
“It was a process of curation, and ultimately, what we have is a set of seven round diamonds which represent the real pinnacle of rarity.”
Of the 76 stones in the latest collection, 74 are from Argyle — the pink, red and blue diamonds — while the remaining two are a yellow and white diamond sourced from Rio’s Daivik mine in Canada.
Rio is displaying the collection — comprising 48 separate lots and weighing a combined 39.44 carats — on an invite-only basis in Perth, London, Singapore and Belgium. Bids for the tender will close on November 18.
Murray Rayner, who was previously the chief geologist for Argyle Diamonds, last year told The West that the existence of Argyle’s pink diamonds was due to a “fluke of nature” that will be extremely difficult to replicate.
Mr Rayner said the pink diamonds emerged around 1.8 billion years ago when the Kimberley collided into Australia, bringing pink diamonds closer to the Earth’s surface.
These pink diamonds were originally created at one point three billion years ago when our planet’s once-connected continents began to rip apart, with the intense pressure from this event causing the pink colouration in the diamonds.
“To find another deposit would be an extraordinarily rare event in its own right, we’ve looked over the last few decades without any success,” he said.
A loose 0.94 carat Argyle Pink – one of the last recovered from the iconic mine in Western Australia – is being sold at auction.
It is the highlight of a 416-lot online event (ending 11 August), featuring many items that belonged to Graham Jackson, former owner of Loloma Jewellers, located in Townsville, Australia, who died aged 92 in May.
The cushion cut fancy intense VS1 gem is designated as 6P – 6/10 for intensity of hue and P for pink as the dominant hue.
It was sold at the 2021 Argyle Pink Tender-Rio Tinto’s Final Collection, the last tender from the mine, which closed in November 2020 after 37 years, during which it produced 90 per cent of the world’s pink diamonds.
The stone is being sold by Sydney-based First State Auctions, with an estimate of AUD$700,000 to AUD$800,000 (US$455,000 to U$520,000).
Last January Tiffany & Co. has bought a parcel of 35 Argyle pinks – from 0.35 carats to 1.52 carats – for “select clients”.
Rio Tinto said it was delighted with the results of its first Beyond Rare Tender of polished pink and red diamonds from Argyle, in Australia, and yellow stones from Diavik, Canada, though it declined to reveal any prices.
Sinead Kaufman, chief executive of Rio Tinto Minerals, said only that the results reflected the global demand for highly collectible natural colored diamonds.
The first in a series of sales featured a collection of 87 diamonds, weighing 29.96 carats in total. Successful bidders came from Australia, Europe, Japan, Hong Kong, Singapore, US and Israel.
Among the lots were seven Masterpiece sets of Argyle dink diamonds and yellow Diavik diamonds, 11 matched pairs of colored diamonds and 30 single diamonds, including one remarkable fancy red Argyle diamonds.
The iconic Argyle mine closed in November 2020 after 37 years. It produced 90 per cent of the world’s pink, red, blue and violet diamonds.
Rio Tinto has launched the Beyond Rare Tender, an inaugural collection of 48 lots of polished fancy-colored diamonds.
The miner will offer 87 diamonds in total, including its legacy inventory of pink and red stones from the shuttered Argyle diamond mine in Australia and yellow diamonds from its Diavik site in Canada, it said on Tuesday.
The new collection is “a testimony to the ongoing demand for highly collectible natural diamonds,” said Sinead Kaufman, chief executive of Rio Tinto Minerals. “This carefully curated collection of rare jewels will be in strong demand by the world’s finest jewelers, collectors and diamond connoisseurs.”
Titled The Art Series, the invitation-only tender is inspired by the art world, the company said. The combined weight of the diamonds is 29.96 carats.
They include the following:
Seven diamonds consisting of Argyle pink stones and yellow Diavik ones, which the company says will be accompanied by bespoke artwork.
An offering of 11 matched pairs of colored diamonds.
Thirty single diamonds, including one distinctive fancy-red Argyle diamond.
The closure of the Argyle mine in Australia and the continued strong demand for exceptional fancy pink and red diamonds means the market for Argyle pink and red diamonds “have never been stronger,” said Patrick Coppens, general manager of sales and marketing for Rio Tinto’s diamonds business.
The 48 lots will be shown in Australia, Switzerland and Belgium, with bids closing on November 20.
Western Australia’s Argyle mine was among nature’s preeminent treasure troves for nearly 40 years. At its peak, Argyle produced more coloured diamonds than anywhere else on Earth and earned an especially sparkling reputation for its unparalleled cache of pink diamonds.
Researchers have spent decades trying to unravel the origins of Argyle’s glimmering gems. Now, by dating minerals in the mine’s volcanic rock, scientists think they may have finally pieced together the process that created the deposit around 1.3 billion years ago. In a paper published on Tuesday in Nature Communications, the team posits that the breakup of an early supercontinent lifted Argyle’s salmon-coloured stones from crushing depths toward Earth’s surface.
Located 2,200 kilometers northeast of Perth, Australia, in the country’s rugged Kimberley region, Argyle mine once covered an area the size of 94 football fields. Between its opening in 1983 and closure in 2020, when mining the gems there was no longer economically viable, Argyle produced more than 865 million carats of rough diamonds. Most of these stones come in pale shades of yellow or brown. But a small percentage of the site’s diamonds radiate rich pinks, purples or reds. More than 90 percent of the world’s pink diamond supply including the nearly 13 carat Pink Jubilee has come from Argyle.
The pink hue of Argyle’s most lavish diamonds is linked to damage they underwent deep within the earth. According to Hugo Olierook, a geologist at Curtin University in Perth and lead author of the new study, these diamonds start out colourless. But immense tectonic pressure from colliding continents can alter the stones’ crystal structure, unlocking the potential colours hidden within. “The diamonds are being forced to bend and twist,” Olierook says. “If they’re twisted just a little bit, it will turn some of these diamonds pink.” Further twisting makes them become brown.
Argyle’s diamonds took on their pink and brown tints around 1.8 billion years ago, when a piece of what is now western Australia smashed into the northern Australian plate and warped the region’s rock. But this only explains part of Argyle’s origin story. When the continents collided, the area’s diamonds were buried in the mantle, hundreds of kilometers below Earth’s surface. If the crystals had been closer to the surface, their carbon atoms would have been compressed into a different structure, transforming them from shimmering diamonds to lumps of dark gray graphite.
A volcano was necessary to bring the molten diamonds up from our planet’s mantle. “You need some sort of tectonic trigger to bring them up to the surface,” Olierook says. As the melt rises, carbon dioxide and steam expand, sparking an eruption that he compares to popping a champagne cork. At Argyle, this eruption likely occurred at a beach, where sand and seawater interacted with volcanic rock called lamproite.
To determine when the eruption occurred, the team sliced two thin sections of Argyle’s volcanic rock and polished them down to a minuscule width. Analyzing the sample’s mineral makeup under a microscope, the researchers were able to pinpoint sand grains from Argyle’s ancient beach and to date them with the help of radioactive elements they contained. By dating the youngest sand grains, the scientists were able to estimate when the beach was buried in lava. They also used tiny lasers to determine the ages of titanite minerals, which formed in the rock when the magma melded with quartz in the beach sand.
Comparing the ages of the youngest sand grains and the oldest titanite crystals allowed the researchers to estimate that the eruption at Argyle occurred between 1.3 billion and 1.26 billion years ago. This age range was older than previous estimates, which surprised Olierook and his colleagues. “We had a betting pool going, and nobody got 1,300 million years,” he says. “That was one of those glass shattering moments.”
That eruption timing corresponds to a volatile period in Earth’s tectonic history when one of the first supercontinents, called Nuna, was splintering apart. The team posits that this instability may have reopened a seam along the continental boundary where Argyle is now situated. This in turn sparked the volcanic activity that brought the diamond-bearing melt toward the surface, creating Argyle’s expansive diamond deposits.
The new time estimates add crucial context for understanding the volcanic eruption at Argyle, says Evan Smith, a researcher at the Gemological Institute of America, who researches the geology of diamonds but was not involved in the new study. “The previous age constraint for Argyle was younger, and it was a lot less clear how to frame the eruption in a broader geological context,” Smith says. He thinks the new study adds exciting evidence that these “eruptions are related to bigger processes that affect whole continents rather than being isolated, random burps of magma.”
Olierook thinks similar events may have occurred at other continental boundaries around the world. Most diamond-bearing deposits are found in the middle of continental plates where rock is exposed. This makes Argyle an outlier. When the mine was first discovered, most geologists thought that searching for diamonds along continental plate boundaries which are often uplifted by ancient mountain belts and buried beneath soil and sand was futile.
Though gem mining in these regions remains difficult, Olierook believes there are plenty of diamonds to be found in the rough. “I think all of them will host some sort of coloured diamonds,” he says. “They may all be brown, but with a little bit of luck, there could be a few pinks in there.”
Diamonds from Rio Tinto’s Argyle Pink Diamond Tender.
Rio Tinto has debuted a new strategy that will enable it to “protect the provenance” of its Argyle pink diamonds, including a certification service and a concierge trading platform.
“This is the start of a new chapter for Argyle pink diamonds, to ensure they maintain their value and investment potential as a finite, unrepeatable natural resource and achieve the status of outstanding heritage diamonds,” Rio Tinto Minerals CEO Sinead Kaufman said last week.
The venture will also play host to a new Beyond Rare tender platform for special sales events, as well as several strategic collections and collaborations involving existing inventory and the secondary market.
One such venture, the Icon Partner program, will give jewelers licensing rights to use the Argyle Pink Diamonds brand for jewelry they create with any remaining inventory they previously purchased from the Argyle mine. The first two retailers Rio Tinto has authorized are John Calleija, the owner of Australian luxury-jewelry house Calleija, and Singapore-based Glajz THG, owned by John Glajz.
“The secondary market for Argyle pink diamonds comprises almost 40 years of rare, polished pink diamonds, together with heirloom pieces of jewelry, collectibles and objects,” the miner noted. “This market requires careful management to preserve the precious provenance of Argyle pink diamonds and continue the legacy of careful custody that underscores its rarity.
Rio Tinto achieved record-breaking figures at its 2021 Argyle Pink Diamonds Tender, with prices strong amid dwindling supply from the mine.
Once in a Blue Moon
The Australian miner offered 70 rare pink and red diamonds at the last-ever edition of the tender, which follows Argyle’s closure in November 2020. The “historical” collection, called The Journey Beyond, comprised the final diamonds mined during the Western Australian deposit’s last year of operation, Rio Tinto said Thursday.
“The 2021 Argyle Pink Diamonds Tender delivered a record-breaking price performance across individual diamonds and for the overall collection,” the company noted. “The diamonds were fiercely contested around the world in a series of virtual and face-to-face viewings.”
A total of 19 bidders from nine countries successfully acquired lots, with prices maintaining their upward trajectory, Rio Tinto explained. Australian jeweler Calleija bought several stones, including the Argyle Eclipse, a radiant-shaped, 3.47-carat, fancy-intense-pink diamond, and the Argyle Bohème, a radiant-shaped, 1.01-carat, fancy-red diamond.
A veteran bidder in Singapore took home both the Argyle Stella, a square radiant-shaped 1.79-carat, fancy-vivid-purplish-pink diamond, and the Argyle Solaris, a radiant-shaped, fancy-intense pink weighing 2.05 carats. Another, based in the US, won the Argyle Lumiere, a square radiant-shaped, 2.03-carat, fancy-deep-pink diamond.
Alongside the pink-diamond tender, Rio Tinto sold a record-breaking collection of 41 blue and violet diamonds from Argyle to a single buyer. Hong Kong fancy-color specialist Kunming Diamonds purchased the entire 24.88-carat lot in a “history-making global bid” at the separate Once in a Blue Moon tender, the miner said. The stones are the final blues to come from Argyle. Kunming also won nine pink lots.
“I don’t think it’s ever been so competitive, so mind-blowing in terms of how the prices have been, how much competition we faced, and there was a lot of emotional premium everyone added, as this was the ultimate tender,” Harsh Maheshwari, executive director of Kunming, told Rapaport News. “So I guess everyone felt that they would like to at least own a few tender stones while they had the opportunity.”
It’s rare for there to be so many successful bidders at the pink tender, Maheshwari noted. Usually, only half that number would take home diamonds.
“This basically shows how varied the prices must have been, and that these stones went to jewelers from all over the world,” Maheshwari added.
The Hero Diamonds from the 2021 Argyle Pink Diamonds Tender
Rio Tinto’s final Argyle Pink Diamonds Tender collection of rare pink, red, blue and violet diamonds is being showcased to connoisseurs, collectors and luxury jewellers in Antwerp, Belgium.
The Argyle Pink Diamonds Tender, an annual invitation-only event for the past 38 years, is widely considered to be the most anticipated diamond sale in the world, showcasing the pinnacle of Argyle’s production to an exclusive group of collectors, diamond connoisseurs and luxury jewellery houses.
Mining ceased at Argyle on 3 November, 2020 and the 2021 Argyle Pink Diamonds Tender is the final collection of the rarest diamonds from the final year of Argyle operations.
Patrick Coppens, General manager, Sales and Marketing for Rio Tinto’s diamonds business said “The first Argyle Pink Diamonds Tender was held in Antwerp in 1984 and I am delighted to host the final epic collection in Antwerp. Over the past 38 years Argyle pink diamonds have pushed the boundaries of rarity and value appreciation to new extremes.
“When you consider the number of diamonds presented at the annual Argyle Pink Diamonds Tender since 1984 would barely fill two champagne flutes, you begin to grasp the rarity and the tremendous gravitas of this final collection. Many of the invitees have participated in the annual Argyle Pink Diamonds Tender for more than three decades and across generations, so it is an emotional moment in the history of Rio Tinto’s Argyle Pink Diamonds business and the natural fancy coloured diamond industry.”
Comprising 70 diamonds weighing 81.63 carats, the 2021 Argyle Pink Diamonds Tender has a record number of diamonds larger than one carat. The collection is headlined with Lot Number 1, Argyle Eclipse™, a 3.47 carat diamond that is the largest Fancy Intense Pink diamond ever offered at the Tender.
Titled The Journey Beyond, the 2021 Argyle Pink Diamonds Tender takes its reference from the 1.5 billion year journey from creation to discovery and their remarkable impact on the world diamond and jewellery history. The Tender collection comprises five ‘hero’ diamonds selected for their unique beauty and named to ensure there is a permanent record of their contribution to the history of the world’s most important diamonds:
Lot 5: Argyle Bohème™ 1.01 carat, radiant shaped Fancy Red diamond
Also offered alongside the 2021 annual Argyle Pink Diamonds Tender are 41 lots of carefully curated Argyle blue diamonds, weighing 24.88 carats in total. Titled Once in a Blue Moon, these are the very last blue and violet diamonds to emerge from the Argyle mine.
Both face to face and virtual viewings are being conducted in Antwerp catering for those markets where COVID-19 restrictions prevent travel. Bids close on October 4, 2021.
Rio Tinto has unveiled a preview of its final showcase of rare Argyle pink, red and blue diamonds from its iconic mine in the remote east Kimberley region of Western Australia.
Mining ceased at Argyle on 3 November, 2020 and the 2021 Argyle Pink Diamonds Tender is the final collection of the rarest diamonds from the final year of Argyle operations.
The Argyle Pink Diamonds Tender, an annual invitation-only event for the past 38 years, is widely considered to be the most anticipated diamond sale in the world, showcasing the pinnacle of Argyle’s production to an exclusive group of collectors, diamond connoisseurs and luxury jewellery houses.
Chief executive of Rio Tinto Minerals, Sinead Kaufman said,“I am delighted to launch this historic collection of extraordinary diamonds, a testament to the amazing Argyle ore body and the men and women who have worked so hard to bring these diamonds to market.”
Comprising 70 diamonds weighing 81.63 carats, the 2021 Argyle Pink Diamonds Tender has a record number of diamonds larger than one carat. The collection is headlined with Lot Number 1, Argyle Eclipse™, a 3.47 carat diamond that is the largest Fancy Intense Pink diamond ever offered at the Tender.
Patrick Coppens, General manager of Sales and Marketing for Rio Tinto’s diamonds business who has been involved throughout the history of the Argyle Pink Diamonds Tender said “The Argyle pink diamond story has continued to enthral throughout the years following the remarkable discovery of the Argyle mine in 1979. The final Tender collection of these beyond rare diamonds will be keenly sought after as heritage gemstones of the future, coveted by collectors and connoisseurs from around the world.”
Titled The Journey Beyond, the 2021 Argyle Pink Diamonds Tender takes its reference from the 1.5 billion year journey from creation to discovery and their remarkable impact on the world diamond and jewellery history. The Tender collection comprises five ‘hero’ diamonds selected for their unique beauty and named to ensure there is a permanent record of their contribution to the history of the world’s most important diamonds:
Lot 5: Argyle Bohème™ 1.01 carat, radiant shaped Fancy Red diamond
Also offered alongside the 2021 annual Argyle Pink Diamonds Tender are 41 lots of carefully curated Argyle blue diamonds, weighing 24.88 carats in total. Titled Once in a Blue Moon, these are the very last blue and violet diamonds to emege from the Argyle mine.
Jewellery historian Vivienne Becker said, “this final epoch making offering of pink, red and blue diamonds encapsulates the near-impossible rarity and compelling beauty of the natural treasures gifted to the world by the east Kimberley region of Western Australia. Over the near four decade life span of the Argyle mine, Rio Tinto has built a unique diamond brand of integrity and authenticity, an Australian icon and source of national pride, now recognised and asked for, by name, across the globe.”
The 2021 Argyle Pink Diamonds Tender will be showcased in Perth, Antwerp, Singapore and Sydney, subject to COVID-19 protocols. Bids close on September 1, 2021.
