metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 7 (Mohs); Color: Translucent green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (aggregate); Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69; Often shows 'aventurescence' (a metallic glitter).
- Hardness
- 7 (Mohs)
- Color
- Translucent green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Mohs); Color: Translucent green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (aggregate); Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69; Often shows 'aventurescence' (a metallic glitter).
Formation & geological history
Formed as a metamorphic rock (Quartzite) from quartz-rich sandstone subjected to high heat and pressure, with the inclusion of chromium-rich Fuchsite mica which provides the green color.
Uses & applications
Used primarily in lapidary work, jewelry (beads, cabochons), carvings, and as a popular stone for crystal healing and decorative ornamentation.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura', meaning 'by chance,' originally referring to the accidental discovery of aventurine glass (goldstone) in the 18th century. Unlike other quartz, it is characterized by platy mineral inclusions that create a shimmering effect.
Field identification & locations
Identify by its green color and shimmering mica inclusions. It is harder than glass and lacks the layering of many other green stones like jadeite or nephrite. Commonly found in India, Brazil, and Russia.
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