Mineral (variety of Quartz)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7.0 (Mohs scale); Color: Pale to dark green with a signature shimmering effect; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale to dark green with a signature shimmering effect
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7.0 (Mohs scale); Color: Pale to dark green with a signature shimmering effect; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed in metamorphic environments where quartz-rich sediments are subjected to high pressure and heat, allowing mica minerals like fuchsite to integrate and create its green hue. Most deposits date back hundreds of millions of years.
Uses & applications
Predominantly used for ornamental purposes, including beads, cabochons, carvings, and tumbled stones. It is also highly popular in the metaphysical and gemstone collecting communities.
Geological facts
The name comes from the Italian 'a ventura,' meaning 'by chance.' This refers to the 18th-century accidental discovery of 'aventurine glass' (goldstone), which this natural mineral closely resembles.
Field identification & locations
Identify in the field by its 'aventurescence,' a metallic glittering caused by platy mineral inclusions. Commonly found in India, Brazil, and Russia. Collectors should look for even color distribution and a strong shimmer.
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