mineral

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Hardness: 2-2.5 (Mohs), Color: Emerald green to light green, Luster: Pearly to vitreous, Crystal Structure: Monoclinic (usually micaceous/platy), Cleavage: Perfect basal, Specific Gravity: 2.8-3.0.

Hardness: 2-2

Identified March 21, 2026More mineral →

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Physical properties

Hardness: 2-2.5 (Mohs), Color: Emerald green to light green, Luster: Pearly to vitreous, Crystal Structure: Monoclinic (usually micaceous/platy), Cleavage: Perfect basal, Specific Gravity: 2.8-3.0.

Formation & geological history

Formed in regional metamorphic environments, specifically in chromium-rich schists. It is often found associated with hydrothermal deposits and ultramafic rocks where chromium is present during metamorphism.

Uses & applications

Used primarily as an ornamental stone, a pigment in green paints, and as a popular specimen for crystal healing and mineral collecting. Occasionally pulverized for decorative use in crafts.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. Its vivid green color comes from traces of chromium replacing aluminum in the mica structure. It is often found as a component in 'Ruby in Fuchsite' specimens.

Field identification & locations

Identify in the field by its emerald green color combined with the classic 'peeling' flaky texture of mica. Commonly found in Brazil, India, Russia, and Zimbabwe. Collectors should look for thin, sparkly green sheets that can be scratched by a fingernail.

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