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Giant diamonds may hold the key to superdeep earthquakes
Earthquakes shouldn’t occur more than 300 kilometers below Earth’s surface, according to most geophysical models. Yet they commonly do—a phenomenon that has mystified seismologists for decades. Now, researchers suggest water carried by tectonic plates shoved beneath continents could be triggering these deep temblors. The find may also explain another marvel: why a huge number of fist-size diamonds form at this depth.
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Pandora says laboratory-made diamonds are forever
The world's biggest jeweller, Pandora, says it will no longer sell mined diamonds and will switch to exclusively laboratory-made diamonds. Concerns about the environment and working practices in the mining industry have led to growing demand for alternatives to mined diamonds.
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Start-up is selling lab-grown diamond rings at a 30% discount—jewelers couldn't tell the difference
When Jason Payne set out to find his girlfriend the perfect engagement ring, he was already facing more pressure than most men looking to take the plunge. His girlfriend had ethical concerns and didn't want to risk sporting a "blood diamond," one mined in a conflict-riddled region of Africa where the sale of the stone helps fuel violence. So instead, Payne proposed with a sapphire ring and felt good about his decision.
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De Beers admits defeat over man-made diamonds
De Beers, the global diamond giant, has announced Tuesday it is launching a new line of jewelry featuring lab-grown diamonds.
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Scientists have figured out a way to make diamonds in a microwave
Synthetic diamonds account for a small portion of the current market, but with growing interest in ethical diamonds, that could change.
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China’s lab-grown diamond industry has De Beers fighting back
The arrival of lab-grown diamonds has challenged the widely-held assumption that diamond prices could only go up
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Sierra Leone Yields Another Massive Diamond
A Sierra Leone mining operation discovered a 476-carat rough diamond at the Meya deposit in the nation’s Kono district last week, its owner announced Friday. Meya Mining, a subsidiary of Namibia-based conglomerate Trustco Group, found the diamond, which ranks as the fifth-largest rough ever found in Sierra Leone, according to Rapaport records. “Any value indication of the diamond is pure speculation at this stage, as the diamond has not yet been examined and assessed by the necessary experts,” Trustco said.
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World's second biggest diamond sells for $53 million
The world's second-biggest diamond has finally found a buyer. After failing to sell at a Sotheby's auction last year, the 1,109-carat uncut stone has now fetched $53 million in a private sale to luxury jeweler Graff Diamonds. The seller, Canada's Lucara (LUCRF), recovered the huge diamond from Botswana's Karowe mine nearly two years ago. It named it Lesedi La Rona, which means "Our Light" in Botswana's Tswana language.
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Boy finds huge 7.44 carat diamond in state park
With a name like Crater of Diamonds, visitors to the Arkansas state park have high expectations. But for 14-year-old Kalel Langford, the dream of finding a diamond came true after just 30 minutes.
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Strange giant diamonds give hints to the inner Earth's composition
The largest diamonds ever mined on earth aren’t just set apart by their large size and luster, but by a unique origin story as well. They were born of metal, growing from patches of liquid iron and gas deep inside the Earth. That’s the conclusion formed in a study published in Science on Thursday, written by Evan Smith of the Gemological Institute of America. Most diamonds form somewhere between 150 and 200 km [93 and 124 miles] deep in the Earth.
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Why Buyers Shunned the World’s Largest Diamond
At 1,109 carats, big as a tennis ball, the world’s largest uncut diamond was expected to shatter records at a June Sotheby’s auction. How did the dazzling stone go unsold? An exclusive reveals what went wrong.
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Hunting for Diamonds Under Canada's Frozen Tundra
A quarter century of digging under ice sees winners, losers, and an Irish billionaire teaming up with De Beers. On the semi-frozen surface of Faraday Lake in Canada’s subarctic, two diamond rigs are drilling around the clock. It’s spring breakup north of the 63rd parallel, which means the Kennady Diamonds Inc. exploration team is running out of time. “It’s starting to candle,” says geologist Martina Bezzola, scuffing her rubber boot over the fast-melting ice where vertical tunnels, or “candles,” have recently appeared.
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World's largest uncut diamond fails to sell at auction
The world's largest uncut diamond has not sold at a London auction. The Lesedi La Rona diamond, expected to sell for more than $70 million, fell notably short of the Sotheby's minimum reserve price. The auction was the first time such a large, rough diamond has been put on public sale. The diamond is the size of a tennis ball and weights in at 1,109 carats. The gem was discovered in Lucara Diamond Corp's Karowe mine in Botswana...
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Largest diamond in over century found in Botswana
A 1,111 carat "high quality diamond" has been discovered at a mine in Botswana, said to be the biggest find in more than a century, according to the mine company. The gem, only second in size to the Cullinan diamond which was unearthered in South Africa in 1905, was mined by Lucara Diamond Corp.
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Russia: Siberian miners unearth massive diamond but how valuable is it?
After Russian mining company Alrosa recently dug up a huge 76.07 carat diamond, we look at the most expensive in the world.
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Tiny diamonds wrapped in graphene get rid of friction
Act like ball bearings
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