metamorphic
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
Hardness: 2-3 (Mohs scale), Color: Emerald green to silvery-green, Luster: Pearly to vitreous, Crystal Structure: Monoclinic (micaceous flakes), Cleavage: Perfect basal
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Physical properties
Hardness: 2-3 (Mohs scale), Color: Emerald green to silvery-green, Luster: Pearly to vitreous, Crystal Structure: Monoclinic (micaceous flakes), Cleavage: Perfect basal
Formation & geological history
Formed via regional metamorphism of clay-rich sediments or through hydrothermal alteration of ultramafic rocks. The presence of chromium provides the distinct green hue.
Uses & applications
Mainly used as an ornamental stone, for carving small figurines, as a gemstone in jewelry (often as cabochons), and as a collector's mineral.
Geological facts
Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. When it contains ruby crystals, it is known as Ruby in Fuchsite.
Field identification & locations
Identify by its sparkly, micaceous sheen and vibrant green color. It is commonly found in Brazil, India, Russia, and South Africa.
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