mineral
Fuchsite
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 2 to 2.5 on the Mohs scale, Color: Emerald green to bluish-green due to chromium, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Perfect basal cleavage, Specific gravity: 2.7 to 3.0
- Hardness
- 2 to 2
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Physical properties
Hardness: 2 to 2.5 on the Mohs scale, Color: Emerald green to bluish-green due to chromium, Luster: Vitreous to pearly, Crystal structure: Monoclinic, Cleavage: Perfect basal cleavage, Specific gravity: 2.7 to 3.0
Formation & geological history
Formed in metamorphic environments, particularly in quartz veins and schist, often associated with hydrothermal alteration and chromium-rich ultramafic rocks.
Uses & applications
Used primarily as a mineral specimen for collectors, sometimes used for ornamental carvings or cabochons, and as an indicator mineral for chromium deposits.
Geological facts
Fuchsite is a chromium-rich variety of muscovite mica. Its brilliant green color often causes it to be mistaken for aventurine quartz or jade, though its softness and micaceous cleavage distinguish it.
Field identification & locations
Can be identified in the field by its distinct green sparkle, micaceous flaky sheets, and softness. Commonly found in metamorphic terrains worldwide, including localities in Russia, Brazil, India, and the USA.
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