metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Hardness: 6.5-7 on Mohs scale; Color: Green with shimmering specks; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 6
- Color
- Green with shimmering specks
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Green with shimmering specks; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed through regional metamorphism where quartz-rich sediments are subjected to high pressure and temperature, incorporating chromium-rich mica (fuchsite) during the recrystallization process.
Uses & applications
Used primarily in lapidary work, jewelry (beads, cabochons), ornamental carvings, and widely used in the metaphysical and crystal healing communities.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance.' This refers to the 18th-century discovery of aventurine glass (goldstone), which the natural stone resembles due to its aventurescence effect.
Field identification & locations
Identify in the field by its distinct 'aventurescence'—a shimmering effect caused by platy mineral inclusions. It is commonly found in India (the largest producer), Brazil, Russia, and Austria.
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