mineral
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 6.5-7.0 (Mohs); Color: Green with brown inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.7
- Hardness
- 6
- Color
- Green with brown inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7.0 (Mohs); Color: Green with brown inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.6-2.7
Formation & geological history
Formed in metamorphic rocks (phyllites and schists) and pegmatites through hydrothermal processes. The green color comes from inclusions of chromium-rich mica known as Fuchsite.
Uses & applications
Used primarily in lapidary work for jewelry, figurines, tumbled stones, and as a decorative stone in landscape and interior design.
Geological facts
Aventurine is famous for its 'aventurescence,' a shimmering effect caused by platy mineral inclusions. While often green, it can also be found in blue, red, or orange varieties depending on the inclusions.
Field identification & locations
Identify by its soapy luster, green hue, and subtle metallic glints when rotated under light. Commonly found in India, Brazil, and Russia. Collectors look for uniform color and strong aventurescence.
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