mineral

Fuchsite

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

Hardness: 2-2.5 on Mohs scale; Color: Emerald green to light green; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9

Hardness: 2-2
Color: Emerald green to light green
Luster: Pearly to vitreous

Identified June 27, 2026More mineral →

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Physical properties

Hardness: 2-2.5 on Mohs scale; Color: Emerald green to light green; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9

Formation & geological history

Formed through regional metamorphism. It is a chromium-rich variety of muscovite mica, typically found in phyllites or schists where hydrothermal fluids have introduced chromium into the mica structure.

Uses & applications

Used primarily as an ornamental stone, in decorative carvings, and as a collector's specimen. It is also ground up for use as a glittery pigment in paints and cosmetics.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. While often found in small flakes, when it occurs in large masses with ruby inclusions, it is known as Ruby in Fuchsite.

Field identification & locations

Identify by its characteristic bright green color and micaceous (pagelike) layering that produces a sparkly effect. It is commonly found in Brazil, India, Russia, and Zimbabwe. Collectors should look for its distinctive pearly sheen and ease of scratching with a fingernail.

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