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Chinese HPHT-grown synthetic diamonds
Large Colourless HPHT Synthetic Gem Diamonds from China

A report on the HPHT growth of large, gem-quality colourless synthetic diamonds in China.

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LCM reveals traces of catalyst and step-like growth marks.
Observation of Etched Surface Micro-Features on HPHT Synthetic Diamonds Using Laser Confocal Microscopy

Laser confocal microscopy, a very reliable method of revealing surface micro-features, is used on an HPHT synthetic diamond to reveal growth structures.

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IMG-FA13-GNI 154371 300x169
Phosphorescence in Synthetic Sapphire

Rare phosphorescence was observed in a synthetic sapphire, which had unusual properties not indicative of a particular growth method.

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