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Parcel of natural pen pearls
The First Identified Non-Nacreous Beaded Cultured Pearl

A report on what appears to be the first non-nacreous beaded cultured pearl examined by a laboratory.

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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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