Dendritic Inclusions in Cambodian Sapphire

A sapphire from Pailin, Cambodia, hosts inclusions that are unusual for this material.

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Omphacite and Chromite: A "Bimineralic Inclusion" in Diamond

Two inclusions appear joined in a diamond host.

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Quarterly Crystal: Cr-Diopside in Diamond

A bright green chromium diopside inclusion is seen in a diamond from South Africa's Kimberley mine.

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Type IIa Diamond with Extraordinary Etch Channels

Rare dissolution etch channels are seen in a natural diamond.

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Green Crystals in Yellow Sapphires

Two yellow sapphires yield surprising green inclusions.

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Opal with Agate-Like Banding

An orangy brown opal from Ethiopia displays a small patch of wavy

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Beryl Crystal in Fluorite

A purple fluorite contains an elongate, rod-shaped beryl crystal.

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Six-Rayed Star in Sapphire from Myanmar

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