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The Wittelsbach Blue

This article describes what is known about the Wittelsbach Blue since it was first reported in 1666, and the gemmological information released to date on this diamond.

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Pink Diamonds from Australia

The author reports on a sudden influx of natural fancy pink diamonds and their origins.

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Possible “Sister” Stones of the Hope Diamond

A recent study compares a specially created model of the Hope diamond with recent computer models of the French Blue to determine if other stones could have resulted from either recutting.

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GemCad View of the French Blue Enclosed Within the Tavernier Blue
A Crystallographic Analysis of the Tavernier Blue Diamond

This study uses both historical information and modern data to create a computer model of the Tavernier Blue, orienting the finished diamond within the original diamond crystal.

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Treated-Colour Pink-To-Red Diamonds from Lucent Diamonds Inc.

Using a multi-step process, Lucent Diamonds has developed a new treatment process for certain natural diamonds that creates colours from pink-purple to red to orangey brown.

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Characterisation and Grading of Natural-Colour Pink Diamonds

Known for their great beauty and rarity, pink diamonds have long been sought after by jewellers, collectors and consumers.

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Gemesis Laboratory-Created Diamonds

High-quality synthetic diamonds created by the Gemesis Corp. are examined and their gemmological properties are explicated.

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Natural-Colour Nonconductive Grey-to-Blue Diamonds

Two new categories of grey-to-blue diamonds are described.

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Diamond Sources and Production: Past, Present and Future

Diamond production’s future appears to belong less to Africa and more to Australia, Canada and the Russian Federation, according to this overview of geologic trends in the industry.

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Grading the Hope Diamond

One of the most popular exhibits at the Smithsonian Institution, the stunning Fancy Dark greyish blue Hope diamond was formally graded by GIA’s gem laboratory.

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