mineral

Fuchsite

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

Hardness: 2-2.5 on the Mohs scale. Color: Bright emerald green, light green, or yellowish-green due to chromium content. Luster: Vitreous to pearly. Crystal structure: Monoclinic, typically found as flaky, micaceous masses or tiny scales. Cleavage: Perfect basal cleavage, yielding flexible sheets.…

Hardness: 2-2
Luster: Vitreous to pearly

Identified August 7, 2026More mineral →

Explore Fuchsite in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Formed in low-grade metamorphic rocks, particularly in chromium-rich quartz veins, schists, and gneisses, often associated with hydrothermal alteration.

Uses & applications

Used primarily as a mineral specimen for collectors, in lapidary arts for decorative carvings, and sometimes as a source of chromium or in metaphysical practices.

Geological facts

Fuchsite is a chromium-rich variety of muscovite mica. When it occurs as fine-grained green inclusions within quartz, the resulting aggregate is known as aventurine quartz.

Field identification & locations

Easily identified by its distinctive silvery-green color, micaceous flaky habit, and softness. Commonly found in countries such as Brazil, Russia, India, and the United States (California).

Other mineral specimens

See all

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

mineral

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

sedimentary

Limonite / Goethite (Iron Ore Mineral nodule)

FeO(OH)·nH2O / FeO(OH)

mineral

Septarian Pebble

Septarian nodule / Concretion

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral