metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
Hardness: 6.5-7 (Mohs); Color: Forest green to sea green with silvery/white inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (massive); Cleavage: None (conchoidal fracture); Specific Gravity: 2.63-2.69
- Hardness
- 6
- Color
- Forest green to sea green with silvery/white inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Forest green to sea green with silvery/white inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (massive); Cleavage: None (conchoidal fracture); Specific Gravity: 2.63-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where high pressure and temperature cause recrystallization and the inclusion of green chromium-rich mica (fuchsite).
Uses & applications
Primarily used in jewelry (beads, cabochons), ornamental carvings, decorative stones in landscaping, and as a popular meditation stone in metaphysical circles.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura', meaning 'by chance', originally referring to accidental aventurine glass production in 18th-century Venice before the stone was common.
Field identification & locations
Identify by its distinctive 'aventurescence' (a shimmering or glistening effect caused by platy mineral inclusions). Common locations include India (largest producer), Brazil, and Russia. It is often mistaken for jade but is harder and has a characteristic grainy texture.
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