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

Wuyi Wang and Thomas Moses, April 28, 2016

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

Xuxu Wu, Taijin Lu, Shi Tang, Jian Zhang, Zhonghua Song, Hua Chen, Jie Ke, and Mingyue He, August 9, 2018

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

Meenakshi Chauhan, October 17, 2013

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

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The internal structures of natural pearls from the marine mollusk Pinctada maxima are the subject of the lead article in this issue. The scattered loose pearls on the cover are from Paspaley’s natural pearl collection, which includes one discovered in the 1970s at the Eighty Mile Beach fishing grounds
G&G Spring 2021 Edition
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