metamorphic
Green Fuchsite in Quartz (sometimes called Green Aventurine)
Fuchsite (Chrome-rich Muscovite) K(Al,Cr)2(AlSi3O10)(OH)2 in Quartz SiO2
Hardness: 6-7 (Quartz matrix); Color: Emerald green to forest green with silvery micaceous flecks; Luster: Vitreous to pearly; Crystal structure: Monoclinic (Fuchsite) / Trigonal (Quartz); Specific gravity: ~2.6-2.9.
- Hardness
- 6-7 (Quartz matrix)
- Color
- Emerald green to forest green with silvery micaceous flecks
- Luster
- Vitreous to pearly
Identified More metamorphic →
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Physical properties
Hardness: 6-7 (Quartz matrix); Color: Emerald green to forest green with silvery micaceous flecks; Luster: Vitreous to pearly; Crystal structure: Monoclinic (Fuchsite) / Trigonal (Quartz); Specific gravity: ~2.6-2.9.
Formation & geological history
Formed through the regional metamorphism of phyllites and schists where chromium is present. The green color is derived from chromium trivalent ions replacing aluminum in the mica structure. Most commercial specimens are from the Precambrian era.
Uses & applications
Used primarily as decorative lapidary material, for carving figurines, making cabochons for jewelry, and as 'healing crystals' or meditation points in the metaphysical market.
Geological facts
Fuchsite is named after the German chemist and mineralogist Johann Nepomuk von Fuchs. While often mistaken for jade due to its color, its distinct silver-flecked mica platelets distinguish it.
Field identification & locations
Identify by looking for the 'aventurescense' effect caused by tiny mica inclusions that shimmer under light. Commonly found in Brazil, India, and South Africa.
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