metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Hardness: 7 Mohs; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous; Crystal Structure: Trigonal (hexagonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Pale to dark green with a shimmering effect (aventurescence)
- Luster
- Vitreous
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 Mohs; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous; Crystal Structure: Trigonal (hexagonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed in metamorphic environments where quartz sandstone is subjected to intense heat and pressure, with the green color provided by the mica mineral fuchsite. It is primarily found in Pre-Cambrian to Paleozoic geological formations.
Uses & applications
Used extensively in jewelry (beads, cabochons), ornamental carvings, crystal healing, and as a decorative stone in architecture and interior design.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', referring to the accidental discovery of aventurine glass in the 18th century. Most green aventurine is sourced from India and Brazil.
Field identification & locations
Identify by its 'aventurescence'—the metallic glitter caused by platy inclusions within the quartz. It is much harder than fluorite but lacks the unique feel of genuine jade. Commonly found in India, Russia, and Brazil.
More like this
