metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Hardness: 6.5-7 (Mohs scale); Color: Pale to deep green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69; notable for '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 scale); Color: Pale to deep green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69; notable for 'aventurescence' (a metallic glitter).
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where high pressure and temperature cause the quartz to recrystallize alongside mica minerals like fuchsite, which give it the green hue.
Uses & applications
Predominantly used for jewelry (beads, cabochons), ornamental carvings, tumbled stones for collectors, and in the metaphysical community for 'luck' or 'prosperity' work.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to the accidental discovery of aventurine glass (goldstone) in the 18th century, which the mineral was later named after due to their similar appearances.
Field identification & locations
Identify in the field by its green translucency and sparkling chrome-mica inclusions; commonly found in India (primary source), Brazil, and Russia. Unlike green jade, it lacks a fibrous structure and often shows visible plates of mica.
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