metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Hardness: 7 Mohs; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Pale to dark green with a shimmering effect (aventurescence)
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Specific Gravity: 2.64-2.69
Formation & geological history
Formed in metamorphic environments where quartz sandstone is subjected to intense heat and pressure, recrystallizing with inclusions of green chromium-rich mica (fuchsite).
Uses & applications
Commonly used for lapidary work, jewelry (beads, cabochons), ornamental carvings, stone gardens, and by gemstone collectors for its shimmering aesthetic.
Geological facts
The name 'Aventurine' is derived from the Italian 'a ventura,' meaning 'by chance,' originally referring to the accidental discovery of aventurine glass in the 18th century.
Field identification & locations
Identify by its characteristic 'aventurescence'—the glittery shimmer caused by mica inclusions. Commonly found in India, Brazil, and Russia. Look for a granular texture when viewed closely.
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