mineral

Fuchsite

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

Hardness: 2-3 (Mohs scale), Color: Emerald green to light green, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Specific gravity: 2.8 and 2.9

Identified June 4, 2026More mineral →

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Physical properties

Hardness: 2-3 (Mohs scale), Color: Emerald green to light green, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Specific gravity: 2.8 and 2.9

Formation & geological history

Forms through regional metamorphism. It is a chromium-rich variety of muscovite mica found in phyllites or schists, often where hydrothermal activity has occurred.

Uses & applications

Primarily used as an ornamental stone, in decorative carvings, and as a component in metaphysical jewelry. Occasionally used as a minor chromium source.

Geological facts

The green color is caused by the replacement of aluminum ions with chromium in the crystal lattice. It was named after the German chemist and mineralogist Johann Nepomuk von Fuchs.

Field identification & locations

Identify by its distinct green color and micaceous cleavage (breaks into thin, flexible flakes). Typically found in Brazil, India, and Zimbabwe. Looking for it in high-grade metamorphic rocks.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

metamorphic