Pyrite and Chromite Inclusion Assemblage in Emerald

Journal of Gemmology
Written By Precious Braswell
Pyrite crystals and abundant chromite grains are prominent in this emerald, consistent with those from Santa Terezhinha de Goias in Brazil. Photomicrographs by R. Zellagui in darkfield illumination; magnified 9x.

Pyrite crystals and abundant chromite grains are prominent in this emerald, consistent with those from Santa Terezhinha de Goias in Brazil. Photomicrographs by R. Zellagui in darkfield illumination; magnified 9x.

This 0.87 ct emerald caught our attention due to the presence of abundant black inclusions. Microscopic observation revealed numerous mineral inclusions, some of which appeared to be pyrite.

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JoG_V36_No 8_Pyrite and Chromite assemblage in Emerald_LWI-1.jpg
JoG_V36_No 8_Pyrite and Chromite assemblage in Emerald_LWI-2.jpg
Precious Braswell
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