mineral

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)

AI-generated identification · may be incorrect

Hardness: 2.0-2.5 (Mohs scale); Color: Pale to deep emerald green; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal cleavage (easily flakes into thin sheets); Specific Gravity: 2.77–2.88.

Hardness: 2
Color: Pale to deep emerald green
Luster: Pearly to vitreous

Identified March 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed through regional metamorphism in low-to-medium grade metamorphic rocks such as phyllites and schists. The green color is derived from chromium trivalent cations replacing aluminum in the mica structure. Common geological ages vary but often occur in Precambrian metamorphic belts.

Uses & applications

Primarily used as a decorative stone, in metaphysical jewelry, or as a source of chromium. In massive form, it is sometimes combined with ruby (Ruby in Fuchsite) for carvings and cabochons.

Geological facts

Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. It is a mica and is often mistaken for green aventurine, which is actually quartz with fuchsite inclusions.

Field identification & locations

Identify in the field by its distinct green color, flaky/micaceous texture, and soft surface that can be scratched by a fingernail. Commonly found in Brazil, India, Russia, and Zimbabwe. Collectors should look for vibrant green color and shimmering 'micaceous' luster.