Winter 2017 - Volume 53, Issue 4
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<em>Gota de Aceite</em> in an emerald from Zambia.
Gota de Aceite in a Zambian Emerald

A phenomenon usually seen in Colombian emeralds is found in a specimen from Zambia.

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Synthetic ruby overgrowth on natural sapphire seed.
Two Unusual Natural Sapphires with Synthetic Ruby Overgrowth

For the first time, the Carlsbad and New York labs see natural sapphire seeds with synthetic ruby overgrowth.

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Diamond with uneven “lizard skin” surface texture.
Lizard Skin on Deformed Diamond

The surface texture of a diamond is affected by the gemstone’s structure.

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Alexandrite cabochon in fluorescent (left) and incandescent light (right).
Cat’s-Eye Alexandrite with Unique Inclusion Pattern

Examination of a chatoyant alexandrite cabochon.

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Sub-hexagonal etch pits in synthetic moissanite.
Synthetic Moissanite Imitating Rough Diamond

A light green specimen, submitted as a rough diamond, is actually a synthetic moissanite.

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