metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7 Mohs; Color: Pale green to forest green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None
- Hardness
- 6
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Pale green to forest green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None
Formation & geological history
Formed through the metamorphism of sandstone into quartzite. Its characteristic green color and internal shimmer are caused by inclusions of platy minerals, most commonly chromium-rich fuchsite mica.
Uses & applications
Widely used in jewelry making for beads, cabochons, and carvings. Also popular in the lapidary arts and metaphysical gift markets as a 'stone of luck'.
Geological facts
The name 'Aventurine' is derived from the Italian 'a ventura', which means 'by chance'. This refers to the accidental 18th-century discovery of aventurine glass (goldstone) in Italy, which shared the mineral's shimmering appearance.
Field identification & locations
Identify in the field by its grainy, quartzite texture and the characteristic 'aventurescence' (metallic glints) when rotated under a light source. Commonly found in India, Brazil, Russia, and Tanzania.
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