metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 7 (Mohs scale); Color: Pale to medium green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 7 (Mohs scale)
- Color
- Pale to medium green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Mohs scale); Color: Pale to medium green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed as a result of regional metamorphism where quartz-rich sedimentary rocks (sandstone) are subjected to high pressure and temperature, recrystallizing and trapping Fuchsite (chromium-rich mica) which provides the green pigment.
Uses & applications
Used widely in lapidary arts for beads, figurines, and cabochons; also popular in the metaphysical community and as an ornamental landscaping stone.
Geological facts
Green Aventurine displays a unique optical phenomenon called 'aventurescence,' which is a glittering or shimmering effect caused by platy mineral inclusions (Fuchsite) reflecting light.
Field identification & locations
Identify in the field by its distinct green color, granular sugary texture, and internal sparkles when rotated under light. Common locations include India (the primary source), Brazil, and Russia.
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