metamorphic
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Hardness: 6.5-7 (Mohs); Color: Pale to dark green; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale to dark 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: 6.5-7 (Mohs); Color: Pale to dark green; Luster: Vitreous to waxy; Crystal structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69
Formation & geological history
Formed through the metamorphism of quartz-rich sedimentary rocks (sandstone) into quartzite, where mineral inclusions like chromium-rich mica (fuchsite) provide the green hue and shimmer (aventurescence).
Uses & applications
Used primarily for jewelry (beads, cabochons), ornamental carvings, figurines, and as a popular stone for crystal collecting and metaphysical purposes.
Geological facts
The name 'Aventurine' is derived from the Italian 'a ventura,' meaning 'by chance,' referencing the accidental discovery of aventurine glass or 'goldstone' in the 18th century. Most natural green aventurine comes from India.
Field identification & locations
Identify by its 'aventurescence' (a metallic glitter effect caused by mica flakes). In the field, look for massive green quartz-like rocks in metamorphic belts. Common in India, Brazil, and Russia.
More like this
