metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7 (Mohs); Color: Mottled forest green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6-2.7. Exhibits aventurescence (a shimmering effect).
- Hardness
- 6
- Color
- Mottled forest green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Mottled forest green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6-2.7. Exhibits aventurescence (a shimmering effect).
Formation & geological history
Formed as a metamorphic quartzite that contains a high volume of chrome-mica (fuchsite) inclusions, which give it the characteristic green color. Found in metamorphic rocks that have undergone heat and pressure.
Uses & applications
Commonly used for tumbled stones, decorative carvings, jewelry (beads, cabochons), and as an ornamental stone in landscaping or interior design.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to the 18th-century discovery of Italian aventurine glass (goldstone) which looked similar to the natural mineral.
Field identification & locations
Identify by its green color and 'schiller' effect or sparkles when turned under light. Common in India, Brazil, and Russia. A favorite for beginners due to its durability and affordability.
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