Mineral

Fuchsite (Green Muscovite)

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

AI-generated identification · may be incorrect

Hardness: 2-3 Mohs. Color: Emerald-green to light silvery-green. Luster: Pearly to Vitreous. Crystal Structure: Monoclinic (usually micaceous/flaky). Cleavage: Perfect basal. Specific Gravity: 2.8-2.9.

Hardness: 2-3 Mohs
Color: Emerald-green to light silvery-green
Luster: Pearly to Vitreous

Identified March 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed through regional metamorphism in phyllites and schists. The characteristic green color comes from chromium substituting for aluminum in the muscovite crystal lattice. It is often found in terrains that have undergone high-pressure, low-temperature metamorphism.

Uses & applications

Used primarily by collectors and in metaphysical jewelry. Occasionally used as an ornamental stone or as a source of chromium, though it is not a primary ore. Also used in the production of cosmetics and paints for its pearly sheen.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. While it looks very similar to green chlorite, it is distinguished by its much higher luster and distinctly sparkly, flaky 'glitter-like' appearance.

Field identification & locations

Identify in the field by its distinct green color and micaceous habit (it can be easily scratched or flaked with a fingernail). Commonly found in Brazil, India, Russia, and the Alps. Look for it in metamorphic rock outcrops where mica is prominent.