mineral
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 2-3 on Mohs scale; Color: Emerald green to light green; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific gravity: 2.8-3.0
- Hardness
- 2-3 on Mohs scale
- Color
- Emerald green to light green
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 2-3 on Mohs scale; Color: Emerald green to light green; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific gravity: 2.8-3.0
Formation & geological history
Formed primarily in metamorphic rocks like schists and gneisses, specifically through the hydrothermal alteration of chromium-bearing minerals in regional metamorphism.
Uses & applications
Used as a pigment in paints, as a decorative stone in carvings, and highly valued by mineral collectors for its vibrant color. In the metaphysical community, it is used as a healing stone.
Geological facts
The green color is caused by small amounts of trivalent chromium replacing aluminum in the crystal structure. It is named after the German chemist and mineralogist Johann Nepomuk von Fuchs.
Field identification & locations
Identify in the field by its distinct bright green micaceous (flaky) appearance and low hardness. Commonly found in Brazil, India, Russia, and Zimbabwe. Look for it occurring in schistose rocks alongside quartz.
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metamorphic
Gypsum (variety Selenite or Alabaster)
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Mineral
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Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock