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Gemstones

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Two white jade bracelets with dark color patches.
Nephrite Bracelet with Filled Cavity

A jade bracelet contains unusual fillers, used to create a smooth surface.

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This 20.60 ct specimen was purchased by the client as a “natural white pearl.”
Filled Pearl with Surface Features

A pearl, thought to be natural, is revealed to be a bead-cultured specimen with a pre-drilled nucleus.

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Bangle of polymer-impregnated aventurine quartz
Polymer-Impregnated Aventurine Quartz, a New Imitation of “Ice Jade”

A bangle, thought to be jadeite jade, is revealed by laboratory testing to be polymer-impregnated aventurine quartz.

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Glass-filled yellow sapphire
Yellow Sapphire Filled with Lead Glass

Lead-glass-filled orangey yellow sapphire undergoes laboratory observation.

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Scapolite fragments exposed to UV radiation
Tenebrescent Irradiated Scapolite

The effect of irradiation on scapolite with tenebrescence, a colour-change phenomenon that occurs after exposure to UV light.

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