Diamonds – The Diamond Certification Laboratory of Australia (DCLA)

The Golconda Blue: The Largest Fancy Vivid Blue Diamond Ever Seen at Auction

Christie’s is preparing to showcase something truly extraordinary — The Golconda Blue, a 23.24 carat Fancy Vivid Blue diamond, set to headline the Magnificent Jewels auction in Geneva on 14 May. Held at the Four Seasons Hotel des Bergues, this remarkable stone carries an estimate of between $35 million and $50 million.

Mounted in a ring designed by the legendary JAR, The Golconda Blue is not only the largest Fancy Vivid Blue diamond ever offered at auction — it’s also one of the rarest and most historically significant diamonds in existence.

Its journey through history is as dazzling as the stone itself. Originally owned by Yeshwant Rao Holkar, the Maharaja of Indore — a prominent patron of art and fine jewellery in the 1920s and 1930s — the diamond was first set into a bracelet by Chaumet in 1923. A decade later, Mauboussin transformed it into a necklace worn by the Maharani, immortalised in a striking portrait by Bernard Boutet de Monvel.

In 1947, the diamond was acquired by none other than Harry Winston, who later sold it as a brooch to the Maharaja of Baroda. After years of being held privately, The Golconda Blue is now returning to the public eye for the first time in decades.

Rahul Kadakia, Christie’s international head of jewellery, called it “a once-in-a-lifetime opportunity,” noting the auction house’s long history with legendary Golconda diamonds such as the Archduke Joseph, the Princie, and the Wittelsbach.

The term Golconda itself refers to the legendary diamond mines of Eastern India, famous for producing some of the world’s most luminous, transparent, and pure gems. Among them are historic stones like the Koh-i-Noor, the Hope Diamond, and the Darya-i-Nur — and now, The Golconda Blue joins this rarefied list.

This sale is not just about a diamond. It’s about history, heritage, and the timeless allure of one of nature’s most breathtaking creations.

Russia Partners with Belarus

Alexei Vladimirovich Moiseev - Russian Deputy Minister of Finance — *Alexei Vladimirovich Moiseev – Deputy Minister of Finance*

Russia is joining forces with its ally Belarus to promote jewelry exports to China, the UAE, Vietnam, and Southeast Asia, in response to G7 sanctions.

The collaboration was agreed last Friday (4 April) after Russia’s deputy finance minister Alexei Moiseyev (pictured) met Belarus’s finance minister Yury Seliverstov in the Belarus capital, Minsk.

Both sides discussed further developing e-commerce in jewelry made in Belarus and Russia, as well as the mutual recognition of state standard marks.

The two countries are close trade partners and Belarus has been sanctioned for supporting Russia’s invasion of Ukraine.

“A marketplace for the sale of Belarusian and Russian jewelry on foreign markets is planned to be launched in test mode this year, Moiseyev said, according to BelTA, Belarus’s state news agency.

He said the Eurasian Development Bank, founded jointly by Russia and Kazakhstan, was taking part in the collaboration.

Source: IDEX

US Tariffs: GIA Expands Dubai and Hong Kong Services

GIA says its Dubai and Hong Kong labs will accept larger stones for grading, in the wake of President Trump’s imposition of retaliatory tariffs on its trading partners.

Last week GIA said its US labs in New York and California would not accept submissions from overseas until confusion had been cleared up over the status of stones entering the country for grading rather than for sale.

In a statement on Monday (7 April) the world’s biggest grading lab said that because of tariff-related “logistical challenges” it was temporarily expanding services in Dubai and Hong Kong.

Dubai will now accept rough or polished diamonds (D-Z) up to 9.99-cts and Hong Kong will impose no size limit, until further notice.

Both labs previously had a 3.99-cts upper size limit. In addition, Hong Kong will now grade fancy color diamonds.

Source: IDEX

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.

See The World's Rarest Diamonds Worth a Total of 100 million at Sotheby's Abu Dhabi

“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

Canada’s Big Three Mines Could Close Early

Canada’s three biggest diamond mines could be forced to close early, an economist has warned, amid the ongoing slump in prices.

Operators reported losses last year for Diavik, Ekati and Gahcho Kue, all in Canada’s Northwest Territories (NWT).

They are slated for closure as they reach the end of their lives – estimated at 2026, 2029 and 2030 respectively – but dwindling demand may render them uneconomic before those dates.

Graeme Clinton, an economist in Yellowknife, capital of NWT, told CBC, Canada’s national broadcaster : “I don’t think nearly enough is made of the state of the markets which are most important to our economy. These low prices could very well mean an early closure.”

He qualified his comments by saying that none of the miners had so far indicated that they’d bring forward their closing dates.

Diamond mining is key to NWT’s economy, representing over a quarter of its GDP, but miners have been hit hard by the downturn.

Rio Tinto’s Diavik mine lost CAD 127m (USD 94.6m) in 2024, Burgundy’s Ekati lost CAD 94.7m (USD 70.5m) and Mountain Province, minority-owner of Gahcho Kue lost CAD 81m (USD 60.0m).

Early closures would cost thousands of jobs, and would dent NWT’s economy.

Source: IDEX

Mining Company Alrosa Unveils Russia’s Largest-Ever Diamond

The 100-carat vivid yellow stone named New Sun

Russian diamond producer Alrosa announced Friday that it finished the two year cutting process of the country’s largest ever diamond a 100 carat vivid yellow stone named New Sun.

New Sun was cut from a billion year old 200 carat rough diamond, which was unearthed from an ancient riverbed at the Ebelyakh mine in the Far East republic of Sakha (Yakutia).

Alrosa said 15 of Russia’s top jewelers worked meticulously to “achieve the perfect balance between light, color and the play of shades.”

“Thanks to the highest skill of Russian experts, the diamond has acquired impeccable proportions that accentuate its depth and brightness of its sunny hue,” the company said.

The cutting process marks a “new stage” in the development of the Russian Cut, a gem cutting technique known for its precision and brilliance, Alrosa said.

“New Sun is one of the most significant events in the gemstone industry in recent years, highlighting Russia’s high status in the global diamond industry,” the company said.

Last month, Alrosa announced the temporary suspension of operations at several less profitable sites, reducing annual production by less than 1 million carats. The company still plans to produce 29 million carats of diamonds in 2025.

Alrosa, which is under an EU and G7 import ban, is the world’s largest diamond mining company by volume. It cut production by 2.8% to 34.6 million carats in 2023 and by 4.6% to 33 million carats in 2024.

Source: Themoscowtimes

Bombshell: Trump’s 26% Tariffs on Indian Exports

India’s diamond industry is in shock today after the US imposed 26 per cent reciprocal tariffs on all its exports.

That’s almost double the 13.3 per cent predicted by India’s Global Trade Research Initiative before yesterday’s news (2 April).

Traders, manufacturers, exporters and others in India’s diamond industry are still struggling to process the scale of the announcement, made by President Donald Trump in what he called his Liberation Day speech, outlining tariffs that would boost domestic industry and “make America wealthy again”.

He said US tariffs would be roughly half those charged by each of its trade partners. India charges the US 52 per cent, he said, a figure that includes currency manipulation.

“The [gems and jewellery] trade is expected to come at a standstill as US importers will assess whether to place orders with Indian jewellery exporters,” said Kirit Bhansali, chairman of the Gem and Jewellery Export Promotion Council, reacting to the news.

“The tariff is higher than expected,” Colin Shah, managing director of Kama Jewelry. “It is quite severe and will affect exports.”

The US represents over 30 per cent of all India’s gem and jewelry exports, worth $10bn a year. Exports of loose diamonds to the US which currently attract no import duty – and gold jewelry, which is charged at 5.5 per cent to 7 per cent. The US has a trade deficit of $46bn with India.

Trump announced a raft of tariffs on trade partners around the world, claiming the US had been losing out for decades.

“They (India) are charging us 52 per cent and we charge almost nothing for years and years and decades,” said Trump during his announcement.

For decades, the president said, the US “has been looted, pillaged, raped and plundered by nations near and far, both friend and foe alike”.

The White House said India imposed “uniquely burdensome” non-tariff barriers. Removing them would increase US exports by at least $5.3bn annually.

The US announced a baseline tariff of 10 per cent on all countries (except Canada and Mexico), to be implemented on 5 April. Additional tariffs (as high as 49 per cent for Cambodia) will be introduced on 9 April for targeted countries.

Source: IDEX

Diavik recovers 158.20 carat ‘miracle of nature’ diamond

One of the largest gem-quality yellow diamonds ever discovered in Canada, has been unearthed from Rio Tinto’s Diavik Diamond Mine.

The 158.20-carat rough diamond is one of only five yellow diamonds weighing more than 100 carats ever unearthed at Diavik in its 22-year history, stated a release.

Diavik’s production primarily consists of white gem quality diamonds, with less than one percent of its production yielding rare yellow diamonds.

Diavik Diamond Mines Chief Operating Officer Matt Breen stated: “This two-billion-year old natural Canadian diamond is a miracle of nature and testament to the skill and fortitude of all the men and women who work in Diavik’s challenging sub-Arctic environment.”

Patrick Coppens, sales and marketing GM for Rio Tinto’s diamonds business, stated: “The beauty and purity of Diavik diamonds continues to excite passions amongst all who see them and we look forward to following the onward journey of this very special diamond.”

Diamond miner Lipari begins trading on Cboe Canada

Canadian diamond miner Lipari Mining has officially begun trading on the Cboe Canada stock exchange following the completion of its recently announced reverse takeover.

“Listing on Cboe Canada marks a major milestone in our company’s growth,” CEO Ken Johnson stated in a news release Monday, adding that the exchange’s global footprint would allow the company to broaden its shareholder base and increase market visibility.

Shares of Lipari Mining traded at C$0.57 at Monday’s open, for a market capitalization of approximately C$83.7 million ($58.5 million).

Formerly known as Golden Share Resources, the company announced last month that it is acquiring Lipari Diamond Mines (LDM) and its assets in Angola and Brazil through an RTO, following which LDM shareholders would own nearly all (96.7%) of the combined company’s shares.

Prior to closing the transaction, LDM raised approximately $3.62 million through a private placement of subscription receipts to support the future development of its two diamond assets.

In Angola, Lipari owns a 75% equity interest in Tchitengo diamond project, encompassing 30 known kimberlite deposits. The Tchiuzo kimberlite represents the most developed, having already been taken to pre-feasibility by Sociedade Mineira de Catoca and ALROSA in 2013 after spending a reported $35.6 million.

In an earlier news release, CEO Johnson said the company has planned a bulk sampling program at Tchiuzo to follow up on the confirmatory drilling completed by LDM last year. This is targeted to produce a representative parcel of rough natural diamonds for evaluation and making a production decision.

Lipari also owns 100% of the Braúna diamond mine located in the state of Bahia, Brazil. Since entering commercial production in July 2016, the mine has produced nearly 1.2 million carats of natural rough diamonds from 6.54 million tonnes of kimberlite mined, for an average production grade of 18.2 cpht. Operations are now focused on the transition of the mine from an open pit to an underground operation.

According to Johnson, the mine is ramping back to full capacity, with the transition to underground mining largely completed. “Our first sale of diamond production from our underground operation is expected in April,” he added.

Source: Mining.com

Guilty: Deloitte Director Bought Pink Diamonds on Company Credit Card

A former director of the Deloitte auditing company in Australia has admitted claiming almost AUD 2.8m ($1.8m) in fraudulent work expenses to buy pink diamonds, high-end art and other luxuries.

Paul Quill, 45, used his corporate credit card to make the purchases from 2016 to 2022, passing some of them off as payments for stationary, postage, photocopying and court fees. He admitted two counts of obtaining financial advantage by deception.

The County Court of Victoria, in Melbourne, heard last Thursday (27 March) that among the sums stolen was AUD 682,587 ($429,000) from Joe Gutnick’s Merlin Diamonds, the mining company that was wound up in 2020 after a series of losses.

The court heard that Quill lost control after the breakdown of a relationship. He will be sentenced on 15 April.

He was dismissed in 2022 after his crime was revealed during a routine audit. Deloitte said at the time that it would make sure all clients were repaid in full.

Source: IDEX