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.
Large Colourless HPHT Synthetic Gem Diamonds from China
A report on the HPHT growth of large, gem-quality colourless synthetic diamonds in China.
Unusual Combination of Inclusions in Synthetic Star Sapphire
A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.
Unusual Short-Wave UV Reaction in Synthetic Blue Spinel
A blue synthetic spinel grown by the Verneuil process displayed the short-wave UV reaction of a flux-grown sample.
Unusual Composite Ruby Rough
In this composite, synthetic ruby rough attached to two natural ruby slabs was fashioned to imitate natural material.
Composite Coral Veneer Glued to Artificial Matrix
Items presented as red coral are revealed by testing to be composite coral veneers over an artificial matrix.
Assemblage of Synthetic Ruby in Calcite Matrix
Material set in a calcite matrix and represented as natural ruby is proven to be synthetic.
Phosphorescence in Synthetic Sapphire
Rare phosphorescence was observed in a synthetic sapphire, which had unusual properties not indicative of a particular growth method.