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Amber with Insect-Bearing Filling

Natural amber beads were found to have been filled with plastic and a variety of insects.

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Boron Carbide: A New Imitation of Black Diamond

The Gem Testing Laboratory in Jaipur identified a black diamond-like specimen as boron carbide, a ceramic material typically used in nuclear, military, and aerospace applications.

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Boron Carbide: A New Imitation Black Diamond

Specimen sold as black diamond identified as ceramic material commonly used in hard-plating applications

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Imitation Rainbow Moonstone Assemblage

Examination of an imitation rainbow moonstone assemblage containing plastic-coated gypsum.

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