metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7 (Mohs); Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal); Cleavage: None; Specific gravity: 2.64-2.69. It displays 'aventurescence' (a metallic glitter).
- Hardness
- 6
- Color
- Pale to deep green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal); Cleavage: None; Specific gravity: 2.64-2.69. It displays 'aventurescence' (a metallic glitter).
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where mica crystals (usually fuchsite) align to create a shimmering effect. Often found in Precambrian and Paleozoic shields.
Uses & applications
Used primarily in jewelry (beads, cabochons), ornamental carvings, landscaping, and as a popular stone for crystal healing and mineral collecting.
Geological facts
Green Aventurine is often called the 'Stone of Opportunity.' Its name comes from the Italian word 'aventura,' meaning 'by chance,' originally referring to the accidental discovery of aventurine glass in the 18th century.
Field identification & locations
Identify by its grainy quartzite texture and the presence of internal sparkly glitters (aventurescence). It is commonly found in India (the largest producer), Brazil, and Russia.
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