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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.

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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.

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International News

Massive 11,000-Carat Ruby Uncovered In Myanmar

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A massive 11,000-carat rough ruby has been recovered in the famed gem-rich region of Mogok, Myanmar, according to recent state media reports.

Weighing in at 2.2 kg (4 lbs 14 oz), the newly discovered stone is roughly half the size of the legendary 21,450-carat rough gem found in the same region back in 1996. However, experts and state officials report that this new find boasts vastly superior color, luster, and transparency.

Mogok rubies, sourced from the “Valley of Rubies” in Myanmar (Burma), are legendary for their unrivaled vivid color and supreme clarity. They are famous worldwide for their “pigeon blood” red hue, which is caused by trace elements and microscopic silk particles that scatter light and give the gem a glowing, velvety softness. 

Key Details of the Discovery:

  • Physical Properties: The giant gem exhibits a striking purplish-red color with yellowish undertones, excellent vitreous luster, and moderate transparency. It remains entirely in its natural, untreated state.
  • Geopolitical Context: Myanmar supplies roughly 90% of the world’s rubies. However, the nation has been embroiled in a devastating civil war since a 2021 military coup—a conflict that has claimed approximately 90,000 lives and displaced over 3.5 million people.
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