metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 7 (Mohs); Color: Green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (rhombohedral); Cleavage: None; Aventurescent shimmer caused by platy inclusions.
- Hardness
- 7 (Mohs)
- Color
- Green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Mohs); Color: Green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (rhombohedral); Cleavage: None; Aventurescent shimmer caused by platy inclusions.
Formation & geological history
Formed in metamorphic environments where quartz is subject to intense pressure and temperature, allowing for the inclusion of mica minerals like Fuchsite, which provide the green color.
Uses & applications
Used extensively in jewelry making, lapidary arts for figurines, cabochons, and as a popular meditation or 'healing' stone in spiritual practices.
Geological facts
The name 'aventurine' is derived from the Italian 'a ventura', meaning 'by chance', originally referring to the accidental discovery of goldstone glass in the 18th century, which looks similar to this natural stone.
Field identification & locations
Identify by its characteristic green color and internal 'glimmer' or spangles of light (aventurescence). Commonly found in India, Brazil, Russia, and Tanzania. Collectors look for even color distribution and strong shimmer.
