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Black 555 55-carat diamond dubbed The Enigma sells for £3 1 million at auction

Named The Enigma , the gem was bought by Richard Heart - the founder of cryptocurrency company Hex - following an online auction by Sotheby s in London.

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Materials: Scientists create ultrahard GLASS that s even harder than a diamond

The so-called carbon glass, which also has the highest thermal conductivity of all known glasses, was produced by researchers led from China s Jilin University.

New yorkUnited statesLisa bissellRichard carlsonYingwei feiWashington carnegie institution for sciencePlanets laboratoryChina jilin universityYanshan universityCarnegie institutionNobel prizePure grown diamonds

As a purist and old school diamantaire, I don t believe in LGD, says Vin Lee, CEO Grand Metropolitan

As a purist and old school diamantaire, I don t believe in LGD, says Vin Lee, CEO Grand Metropolitan
rough-polished.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from rough-polished.com Daily Mail and Mail on Sunday newspapers.

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Scientists discover a colour-changing diamond that transforms from grey to yellow

The discovery was made by Stephanie Persaud at the Gemological Institute of America in Carlsbad, California. She was grading diamonds for clients when she noticed the cryogenic diamond .

New yorkUnited statesFrance generalPaul johnsonStephanie persaudLisa bissellGeorges halphenOleg kovalchukGemological institute of americaGeological society of americaDevelopment geological enterpriseGemological instituteNew scientistGeological societyRussian matryoshkaDeputy director

Unique diamond with ANOTHER gem trapped inside is discovered in Russia

Unique diamond with ANOTHER gem trapped inside is discovered in Russia
dailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailymail.co.uk Daily Mail and Mail on Sunday newspapers.

Sakha yakutiyaNew yorkUnited statesLisa bissellOleg kovalchukDevelopment geological enterpriseRussian matryoshkaDeputy directorYakutsk diamond trade enterprisePure grown diamondsபுதியது யார்க்ஒன்றுபட்டது மாநிலங்களில்லிசா பிஸ்ஸல்வளர்ச்சி புவியியல் நிறுவனதுணை இயக்குனர்தூய்மையானது வளர்ந்த வைரங்கள்