metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
Hardness: 7 Mohs; Color: Pale to forest green; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific Gravity: 2.64-2.69; Features a sparkly effect called aventurescence.
- Hardness
- 7 Mohs
- Color
- Pale to forest green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to forest green; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific Gravity: 2.64-2.69; Features a sparkly effect called aventurescence.
Formation & geological history
Forms in metamorphic rocks like phyllite and schist, where quartz recrystallizes under heat and pressure alongside platy minerals like chromian mica (fuchsite) which provide the green color.
Uses & applications
Used primarily in jewelry making (beads, cabochons), ornamental carvings, figurines, and as a popular stone in crystal collections and lapidary arts.
Geological facts
The name aventurine derives from the Italian 'a ventura', meaning 'by chance', originally referring to the accidental discovery of goldstone (a man-made glass) which shares a similar glittery appearance.
Field identification & locations
Identify by its characteristic green color and shimmering internal reflections. Commonly found in India (the primary source), Brazil, and Russia. Collectors value deep, uniform color and strong shimmer.
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