Large Colourless HPHT Synthetic Gem Diamonds from China
A report on the HPHT growth of large, gem-quality colourless synthetic diamonds in China.
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.
Phosphorescence in Synthetic Sapphire
Rare phosphorescence was observed in a synthetic sapphire, which had unusual properties not indicative of a particular growth method.