metamorphic
Green Aventurine (Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 6.5-7 (Mohs scale); Color: Pale to medium green with white sections; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale to medium green with white sections
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Pale to medium green with white sections; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of quartz-rich sandstone. The distinct green color is caused by the presence of chromium-rich mica (fuchsite) platey inclusions that align during stone formation.
Uses & applications
Commonly used for lapidary work, cabochon cutting, beads for jewelry, ornamental carvings, and widely sold as a 'healing stone' in the metaphysical community.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura' meaning 'by chance,' referring to the 18th-century discovery of aventurine glass (goldstone) which looked similar to the natural mineral discovered later.
Field identification & locations
Identify in the field by its hardness (it will scratch glass), its granular/sugary texture, and the 'aventurescence' (a shimmering effect caused by light reflecting off internal mineral flakes). Commonly found in India, Brazil, and Russia.
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