metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2
Hardness: 6.5-7 on Mohs scale; Color: Translucent to opaque green; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69; Distinctive feature: Aventurescence (metallic glitter).
- Hardness
- 6
- Color
- Translucent to opaque 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 on Mohs scale; Color: Translucent to opaque green; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69; Distinctive feature: Aventurescence (metallic glitter).
Formation & geological history
Formed as a metamorphic rock (Quartzite) where intense heat and pressure cause quartz to recrystallize alongside mica minerals like fuchsite, which provide the green hue and shimmering effect.
Uses & applications
Commonly used for ornamental carvings, beads and jewelry, landscape stones, and as a popular specimen for crystal collectors and metaphysical practices.
Geological facts
The name comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental-discovery 'goldstone' glass that looks similar. It is often called the 'Stone of Opportunity' in folklore.
Field identification & locations
Identify by its characteristic 'shimmer' or internal glitter caused by mica flakes. It is frequently found in India, Brazil, Russia, and Austria. Collectors look for uniform color and strong aventurescence.
More like this
