metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2)
Hardness: 7 Mohs; Color: Muted to vibrant green with silvery-green shimmers; Luster: Vitreous to waxy; Crystal Structure: Trigonal (granular aggregate); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Muted to vibrant green with silvery-green shimmers
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Muted to vibrant green with silvery-green shimmers; Luster: Vitreous to waxy; Crystal Structure: Trigonal (granular aggregate); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed as a metamorphic rock (quartzite) when quartz-rich sedimentary rocks undergo intense heat and pressure, causing recrystallization. The green color and shimmering quality (aventurescence) come from the presence of Fuchsite mica flakes.
Uses & applications
Widely used for ornamental carvings, jewelry (tumbled stones, beads, cabochons), and as a decorative stone in landscaping or interior design. It is also highly popular in the metaphysical community as a 'stone of opportunity'.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura', meaning 'by chance', originally referring to the accidental discovery of 'aventurine glass' in the 18th century, which this natural stone happens to resemble.
Field identification & locations
Identified by its granular texture and the 'aventurescence' effect (a metallic glitter caused by light reflecting off mica). Common locations include India (the primary source), Brazil, and Russia. Collectors should look for even color distribution and strong sparkle.
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