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Fuchsite

The Mica Minerals

Fuchsite (FOOK-site), K(Cr,Al)2Si3AlO10(OH,F)2, is a chromium-rich variety of muscovite. This specimen is from the Minas Gerais province of Brazil.
Chromian muscovite
Photo (c) 2009 Andrew Alden, licensed to About.com (fair use policy)

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Gallery Index: The Mica Minerals
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