mineral

Fuchsite (Chrome Mica)

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

Hardness: 2-2.5 on Mohs scale. Color: emerald green to yellowish-green due to chromium substitute. Luster: pearly to vitreous, highly micaceous and reflective. Cleavage: perfect in one direction, flaky. Crystal system: monoclinic.

Hardness: 2-2
Color: emerald green to yellowish-green due to chromium substitute
Luster: pearly to vitreous, highly micaceous and reflective

Identified July 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed through regional metamorphism of rocks containing chromium, typically associated with mica schists, quartzites, and ultramafic rocks altered by hydrothermal activity.

Uses & applications

Popular as a decorative display mineral, gemstone material, and ornamental stone. Highly valued by collectors for its brilliant green shimmer and sparkle. Sometimes used in metaphysical carvings.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. When fuchsite occurs as fine inclusions inside quartz, it creates the aventurescent gemstone known as Green Aventurine.

Field identification & locations

Identified in the field by its distinctive bright emerald-green color combined with typical mica features—flaky, flexible sheets that sparkle brilliantly in light. Commonly found in Brazil, Russia, Zimbabwe, Madagascar, and India.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral

Nephrite Jade

Nephrite

Mineral/Rock