metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 on Mohs scale; Color: Translucent to opaque pale green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (Microcrystalline); Cleavage: None; Specific gravity: 2.64 - 2.69. It is characterized by 'aventurescence' (a metallic glitter).
- Hardness
- 7 on Mohs scale
- Color
- Translucent to opaque pale 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: Translucent to opaque pale green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (Microcrystalline); Cleavage: None; Specific gravity: 2.64 - 2.69. It is characterized by 'aventurescence' (a metallic glitter).
Formation & geological history
Formed through the metamorphism of quartz-rich sedimentary rocks (sandstone). The green color and glitter are caused by inclusions of chromium-rich muscovite mica (fuchsite) that align during the metamorphic process.
Uses & applications
Used primarily in jewelry (beads, cabochons), ornamental carvings, figurines, and as a popular decorative 'healing' stone in metaphysical practices.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' referring to the 18th-century discovery of Goldstone glass, which looks similar. While quartz-based aventurine is most common, it can also occur in feldspar (sunstone).
Field identification & locations
Identify in the field by its grainy texture, green color, and internal sparkles when rotated under light. Common locations include India (the largest producer), Brazil, Russia, and Austria.
More like this
