metamorphic

Fuchsite or Green Mica Schist

Muscovite variant (KAl2(AlSi3O10)(OH)2 with Cr)

AI-generated identification · may be incorrect

Hardness: 2-3 (Mohs), Color: Emerald green to silvery-green, Luster: Pearly to vitreous, Crystal structure: Monoclinic (platy/flaky), cleavage: perfect basal.

Identified July 21, 2026More metamorphic →

Explore Fuchsite or Green Mica Schist in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 2-3 (Mohs), Color: Emerald green to silvery-green, Luster: Pearly to vitreous, Crystal structure: Monoclinic (platy/flaky), cleavage: perfect basal.

Formation & geological history

Formed through regional metamorphism of clay-rich sedimentary rocks or hydrothermally altered ultramafic rocks. The green color comes from chromium replacing aluminum in the crystal lattice.

Uses & applications

Used as an ornamental stone, a source of industrial mica for insulation, and in the metaphysical/gemstone market for carvings and cabochons.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. It is a chromium-rich variety of muscovite.

Field identification & locations

Identify by its distinct green sparkle and the fact that it can be scratched with a fingernail or penny. Often found in schist belts and metamorphic terrains globally.