metamorphic
Fuchsite Quartzite (Green Aventurine in raw form)
Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 6.5-7 (Quartz content); Color: Pale to medium green with silvery speckles; Luster: Vitreous to pearly; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture)
- Hardness
- 6
- Color
- Pale to medium green with silvery speckles
- Luster
- Vitreous to pearly
Identified More metamorphic →
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Physical properties
Hardness: 6.5-7 (Quartz content); Color: Pale to medium green with silvery speckles; Luster: Vitreous to pearly; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture)
Formation & geological history
Formed through the regional metamorphism of quartz-rich sandstone. The green coloration is provided by inclusions of chromium-rich mica (Fuchsite) that grew during the metamorphic process. Often found in Precambrian metamorphic belts.
Uses & applications
Used primarily for lapidary work, decorative carvings, landscaping stone, and as a popular 'healing' crystal in metaphysical markets.
Geological facts
The green shimmering effect seen in this rock is known as 'aventurescence,' caused by light reflecting off tiny plates of mica within the quartz matrix. It is often mistaken for jade by beginners.
Field identification & locations
Identify by its hardness (will scratch glass) and the presence of sparkling green mica flakes throughout the stone. Common in Brazil, India, and parts of Russia.
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