metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 on Mohs scale; Color: Pale to deep green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 7 on Mohs scale
- Color
- Pale to deep green
- Luster
- Vitreous to waxy
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale; Color: Pale to deep green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of quartz-rich sedimentary rocks (sandstone) where mica inclusions like green fuchsite are present. It is typically found in Precambrian metamorphic terrains.
Uses & applications
Primarily used as a gemstone for jewelry (beads, cabochons), ornamental carvings, stone inlays, and widely sold in the metaphysical or 'healing crystals' market.
Geological facts
Aventurine is known for 'aventurescence,' a shimmering effect caused by platy mineral inclusions reflecting light. The name comes from the Italian 'a ventura' (by chance), originally referring to the accidental discovery of goldstone glass in the 18th century which looks similar.
Field identification & locations
Identify in the field by its grainy, quartzite-like texture and its distinctive internal shimmer when rotated under light. Most commonly sourced from India, Brazil, and Russia. Collectors look for even saturation of color and high mica content.
More like this
