mineral
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2)
Hardness: 7 on the Mohs scale; Color: Translucent to opaque light green; Luster: Vitreous to waxy with micro-glimmer (aventurescence); Crystal structure: Trigonal (microcrystalline quartz); Cleavage: None.
- Hardness
- 7 on the Mohs scale
- Color
- Translucent to opaque light green
- Luster
- Vitreous to waxy with micro-glimmer (aventurescence)
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Physical properties
Hardness: 7 on the Mohs scale; Color: Translucent to opaque light green; Luster: Vitreous to waxy with micro-glimmer (aventurescence); Crystal structure: Trigonal (microcrystalline quartz); Cleavage: None.
Formation & geological history
Formed in hydrothermal veins, pegmatites, and metamorphic quartzites where mica minerals, particularly chromium-rich fuchsite, crystallize within quartz, creating its characteristic shimmering green color.
Uses & applications
Widely used in ornamental carvings, beads, polished cabochons, polished eggs, tumbled stones, costume jewelry, and crystal healing practices.
Geological facts
The name 'aventurine' comes from the Italian 'a ventura', meaning 'by chance', referencing the accidental discovery of aventurine glass (goldstone) in Italy during the 18th century.
Field identification & locations
Identified by its distinctive pale-to-medium green translucent body and tiny reflective mica flecks inside. Major commercial sources include India, Brazil, Russia, and South Africa.
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