mineral
Fuchsite
Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 2-3 (Mohs scale), Color: Emerald green, Luster: Pearly to vitreous, Crystal structure: Monoclinic, Cleavage: Perfect basal, Specific gravity: 2.8 - 2.9
Identified More mineral →
Explore Fuchsite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 2-3 (Mohs scale), Color: Emerald green, Luster: Pearly to vitreous, Crystal structure: Monoclinic, Cleavage: Perfect basal, Specific gravity: 2.8 - 2.9
Formation & geological history
Formed in metamorphic rocks, specifically schists and gneisses, as a result of hydrothermal activity or regional metamorphism of chromium-rich rocks.
Uses & applications
Used as an ornamental stone, a pigment in paints (mica green), and occasionally in jewelry as cabochons, though it is soft. Highly valued by collectors for its vibrant color.
Geological facts
Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. Its intense green color is caused by the presence of trivalent chromium replacing aluminum in the mica structure.
Field identification & locations
Identifiable by its brilliant green color and micaceous, flaky habit. It is often found in Madagascar, Brazil, and India. Collectors should look for the characteristic glittery, micaceous surface.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic