International News
Rio Tinto Unveils Rare 158ct Yellow Diamond from Diavik Mine in Canada
One of the largest gem-quality yellow diamonds ever discovered in Canada, the 158.20-carat gem is a remarkable find as Diavik Mine nears closure.
Rio Tinto has uncovered a rare and exceptional 158.20-carat yellow diamond at its Diavik Mine in Canada, marking one of the largest gem-quality yellow diamonds ever found in the country. This stunning discovery is also among only five yellow diamonds weighing over 100 carats to be unearthed by the company at Diavik throughout its 22-year history. Notably, Diavik is primarily known for producing white diamonds, with less than 1% of its output being yellow stones.
The Diavik Mine, which is set to close next year, is also responsible for several significant yellow diamond finds, including Canada’s largest yellow diamond, a 552.74-carat gem discovered in 2018, and the 187.7-carat Diavik Foxfire found in 2015.
With the closure of the Argyle mine in Australia in 2020, Diavik is now Rio Tinto’s sole diamond asset. Patrick Coppens, General Manager of Sales and Marketing for Rio Tinto’s diamond business, expressed excitement over the unique beauty and purity of the Diavik diamonds, eagerly anticipating the future of this extraordinary find.
International News
De Beers Assumes 100% Control Of Gahcho Kué Diamond Mine
A Global Slump In Diamond Demand Hit The Company Hard. Its Revenue Dropped 42% In 2025, and Average Diamond Prices Plummete
De Beers is taking 100% control of the Gahcho Kué diamond mine in Canada’s Northwest Territories. Its partner, Mountain Province Diamonds, was facing major financial trouble and agreed to hand over its 49% share in exchange for being cleared of all its debts to De Beers.
​Here is why Mountain Province ran into trouble:
​Falling Diamond Prices: A global slump in diamond demand hit the company hard. Its revenue dropped 42% in 2025, and average diamond prices plummeted—falling to just $36 per carat in the second quarter.
​Massive Debt: Mountain Province was struggling to pay back tens of millions of dollars in short-term loans. Ratings agency S&P warning that the company was at high risk of defaulting on its debts.
​Cost-Cutting and Emergency Funds: To stay afloat, the company paused expansion plans at the mine, delayed payments into environmental cleanup funds, and sold future diamond sales rights to major investor Dermot Desmond (an Irish billionaire) for quick cash.
​Despite selling twice as many diamonds recently, prices were too low to cover their debts.
CEO Jonathan Comerford explained that trade tariffs and Middle East conflicts crushed diamond prices, leaving handing over their share of the mine as the best option to cancel liabilities and secure local jobs.
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