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Rough CLIPPIR diamonds
The Very Deep Origin of the World’s Biggest Diamonds

Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.

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The Cullinan Diamond Centennial: A History and Gemmological Analysis Of Cullinans I And II

Eight decades after the Cullinan diamond was mined, a team of gemmologists examined the two famous gems that were created from it to become part of the Crown Jewels of England.

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A History of Diamond Sources in Africa: Part II

This article explores the mining developments and new diamond occurrences in Africa that led to many of the key concepts in modern geology.

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Modern Diamond Cutting and Polishing

Over the last 25 years, the diamond-cutting industry worldwide has been revolutionised by sophisticated instruments that provide invaluable aid in the process of creating a polished gem.

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The Changma Diamond District, Mengyin, Shandong Province, China

One of China's most important discoveries to date is the Changma kimberlite district in Shandong Province.

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An Important Exhibition of Seven Rare Gem Diamonds

The stories behind seven strikingly beautiful rare natural diamonds, united in an exhibit at the Smithsonian, are told here.

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