metamorphic

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

AI-generated identification · may be incorrect

Hardness: 2-3 Mohs; Color: Pale to emerald green; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.88

Hardness: 2-3 Mohs
Color: Pale to emerald green
Luster: Pearly to vitreous

Identified July 13, 2026More metamorphic →

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Physical properties

Hardness: 2-3 Mohs; Color: Pale to emerald green; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.88

Formation & geological history

Formed through the regional metamorphism of clay-rich sediments or the hydrothermal alteration of ultramafic rocks, where chromium replaces some aluminum in the muscovite structure.

Uses & applications

Primarily used as an ornamental stone, for carving, in jewelry (cabochons), and for healing stone/metaphysical collections.

Geological facts

Fuchsite is the chromium-rich variety of muscovite mica. It is responsible for the green color and spangled 'aventurescence' effect in green aventurine quartz.

Field identification & locations

Identify by its soft, flaky (micaceous) texture and shimmering green color. Commonly found in Brazil, India, Zimbabwe, and the Ural Mountains in Russia.