mineral
Fuchsite
Cr-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
AI-generated identification · may be incorrectHardness: 2-3 (Mohs scale), Color: Emerald green, Luster: Pearly to vitreous, Crystal structure: Monoclinic, Cleavage: Perfect basal, Specific gravity: 2.8 - 2.9
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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.
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