metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Hardness: 7 on Mohs scale; Color: Emerald green; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 7 on Mohs scale
- Color
- Emerald green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Emerald green; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed as a metamorphic rock (quartzite) containing inclusions of green fuchsite mica. These minerals were subjected to high pressure and temperature over millions of years, often in orogenic metamorphic environments.
Uses & applications
Used primarily in jewelry (cabochons, beads), decorative objects, figurines, and widely collected as a metaphysical healing stone.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura,' meaning 'by chance.' This refers to the accidental discovery of 'aventurine glass' in the 18th century, which looks similar to the natural stone.
Field identification & locations
Identify by its 'aventurescence'—a shimmering effect caused by light reflecting off platy mineral inclusions. Commonly found in India, Brazil, and Russia. Distinct from jade due to its sparkling mica inclusions and higher hardness.
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