mineral

Fuchsite

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

Hardness: 2-3 Mohs scale; Color: Emerald green to light green; Luster: Pearly to vitreous (glassy); Crystal Structure: Monoclinic (often found in micaceous masses); Cleavage: Perfect basal cleavage (easily flakes into thin sheets); Specific Gravity: 2.77 - 2.88.

Hardness: 2-3 Mohs scale
Color: Emerald green to light green
Luster: Pearly to vitreous (glassy)

Identified March 21, 2026More mineral →

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Physical properties

Formation & geological history

Formed via regional metamorphism within phyllites or schists. It is a chromium-bearing variety of muscovite mica. Its green color comes from the substitution of trivalent chromium for aluminum in the crystal lattice. Usually associated with metamorphic environments rich in aluminum and chromium.

Uses & applications

Primarily used as an ornamental stone, a collector's mineral, and in the metaphysical/lapidary market for carvings. It is also a key component in 'Green Aventurine' (which is quartz dense with fuchsite inclusions).

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. While it looks like emerald due to the chromium content, its soft, flaky mica structure means it cannot be used as a traditional gemstone.

Field identification & locations

Identify in the field by its distinctive bright green color and micaceous habit (ability to peel off 'glittery' flakes with a fingernail). Commonly found in Brazil, India, Zimbabwe, and the Ural Mountains in Russia. Collectors should look for its characteristic shimmer and soft texture.

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