Omphacite and Chromite: A "Bimineralic Inclusion" in Diamond

Two inclusions appear joined in a diamond host.

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Dendritic Inclusions in Cambodian Sapphire

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

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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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