metamorphic
Green Aventurine
Aventurine (Quartz variety), SiO2
Hardness: 7 Mohs; Color: Light to dark green with small darker inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Light to dark green with small darker inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Light to dark green with small darker inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone or shale into quartzite, where mica inclusions (fuchsite) create the green color and signature 'aventurescence' shimmer.
Uses & applications
Widely used in jewelry (beads, cabochons), ornamental carvings, meditation stones, and interior decoration such as tiles or countertops.
Geological facts
The name 'aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to the accidental discovery of goldstone glass in the 18th century, which this stone resembles.
Field identification & locations
Identify by its characteristic green color and shimmering specks (aventurescence) when turned under light. Most commonly found in India, Brazil, and Russia. It can be distinguished from jade by its lower density and harder surface.
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