Fuchsite

Physical Properties

Hardness: 2-3 on Mohs scale. Color: Emerald-green to pale green. Luster: Pearly to vitreous. Crystal structure: Monoclinic (often appears micaceous or flaky). Cleavage: Perfect basal. Specific gravity: 2.8-3.0.

Formation & Geological History

Formed primarily in metamorphic rocks such as phyllites and schists through the hydrothermal alteration of chromium-bearing minerals in ultra-mafic rocks.

Uses & Applications

Used largely as an ornamental stone, in gemstone carvings, and as a collector's specimen. It is also ground up for use as a green pigment in paints and cosmetics.

Geological Facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. It is a variety of muscovite mica where chromium replaces some of the aluminum, giving it a vibrant green hue.

Field Identification & Locations

Field identification involves checking for a micaceous (flaky) texture and the distinct bright green color. It is often found in Madagascar, Brazil, and Russia. Collectors should look for specimens that don't crumble easily.

Identified on: 5/10/2026

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