mineral

Fuchsite

Chrome-bearing Muscovite [K(Al,Cr)2(AlSi3O10)(OH)2]

Hardness: 2-3 (Mohs scale); Color: Emerald green; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific gravity: 2.80-2.88

Hardness: 2-3 (Mohs scale)
Color: Emerald green
Luster: Vitreous to pearly

Identified May 20, 2026More mineral →

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Physical properties

Hardness: 2-3 (Mohs scale); Color: Emerald green; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific gravity: 2.80-2.88

Formation & geological history

Forms in metamorphic rocks such as phyllites or mica schists that have undergone regional metamorphism, typically enriched by chromium during hydrothermal processes.

Uses & applications

Used primarily as an ornamental stone, in decorative carvings, and as a popular specimen for mineral collectors. Occasionally used in jewelry as cabochons.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. The intense green color is caused by trace amounts of chromium trivalent cations substituting for aluminum.

Field identification & locations

Identify by its distinctive bright green color and flaky, micaceous habit. Commonly found in Brazil, India, Zimbabwe, and Russia. When occurring with Ruby, it is known as Ruby-in-Fuchsite.

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