metamorphic
Fuchsite with Ruby
Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 2-3 (Fuchsite) to 9 (Ruby); Color: Emerald green with pink/red spots; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect mica-like; Specific Gravity: 2.8 - 4.0.
- Hardness
- 2-3 (Fuchsite) to 9 (Ruby)
- Color
- Emerald green with pink/red spots
- Luster
- Pearly to vitreous
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Physical properties
Hardness: 2-3 (Fuchsite) to 9 (Ruby); Color: Emerald green with pink/red spots; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect mica-like; Specific Gravity: 2.8 - 4.0.
Formation & geological history
Formed through regional metamorphism in schist and gneiss environments rich in chromium. Found mainly in Precambrian rocks. The green color comes from chromium replacing aluminum in the mica structure.
Uses & applications
Primarily used as a decorative stone, in jewelry as cabochons, and as a popular collector's mineral specimen. Often used in metaphysical practices.
Geological facts
Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. This specific combination is often found in India and is a favorite among mineral enthusiasts for its striking color contrast.
Field identification & locations
Identified by its distinctive sparkly green micaceous texture and hexaganol pink-red corundum inclusions. Commonly found in India, Brazil, and parts of Russia. Look for the 'flaky' mica habit with red spots.
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