metamorphic
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 (Mohs scale); Color: Forest green to translucent green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); specific gravity: 2.64-2.69; cleavage: none (conchoidal fracture).
- Hardness
- 7 (Mohs scale)
- Color
- Forest green to translucent green
- Luster
- Vitreous to waxy
Identified More metamorphic →
Explore Green Aventurine in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs scale); Color: Forest green to translucent green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); specific gravity: 2.64-2.69; cleavage: none (conchoidal fracture).
Formation & geological history
Formed through the regional metamorphism of sandstone or other silica-rich sedimentary rocks, where heat and pressure recrystallize the quartz and incorporate mica flakes (Fuchsite).
Uses & applications
Predominantly used for lapidary work, jewelry, ornamental carvings, tumbled stones for collectors, and as a decorative architectural stone.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' originally referring to the accidental discovery of aventurine glass. The characteristic shimmering effect it displays is known as aventurescence.
Field identification & locations
Identify by its deep green color and the presence of tiny glittering mica inclusions when rotated under light. Commonly found in India, Brazil, and Russia. Collectors look for high aventurescence and uniform color distribution.
More like this
