mineral
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Pale to medium green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed primarily in metamorphic rocks such as phyllites and schists, often through the recrystallization of quartz in the presence of chromium-rich mica (Fuchsite) which gives it its green color.
Uses & applications
Extensively used for ornamental carvings, pocket stones, decorative tiles, and jewelry such as beads, cabochons, and tumbled stones.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to the accidental discovery of goldstone glass in the 18th century which looked similar to this mineral.
Field identification & locations
Identify by its characteristic platy green inclusions that create a shimmering effect called 'aventurescence'. Commonly found in India, Brazil, Russia, and Madagascar. High-quality field specimens show a distinct sparkle under direct light.
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Gypsum (variety Selenite or Alabaster)
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Mineral
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Mineral/Rock
Granite
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