mineral
Aventurine (Green Quartz)
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness 7 on the Mohs scale, dull to vitreous or greasy luster, translucent to opaque green color with characteristic shimmering effect (aventurescence) caused by microscopic mica flakes, hexagonal (trigonal) crystal structure.
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Physical properties
Hardness 7 on the Mohs scale, dull to vitreous or greasy luster, translucent to opaque green color with characteristic shimmering effect (aventurescence) caused by microscopic mica flakes, hexagonal (trigonal) crystal structure.
Formation & geological history
Formed metamorphicly or magmatically in quartzites and pegmatites where silica-rich fluids cool and crystallize around platy fuchsite mica crystals.
Uses & applications
Popular for ornamental carvings, gemstone cabochons, jewelry, lapidary projects, and decorative items. Highly popular among rock collectors and metaphysical crystal enthusiasts.
Geological facts
The name 'aventurine' derives from the Italian 'a ventura', meaning 'by chance', originally referencing 'aventurine glass' (goldstone) which was discovered accidentally before the natural stone was named.
Field identification & locations
Identified by its distinctive grainy quartz texture with fine green speckling and shimmering aventurescence. Commonly found in India, Brazil, Russia, and South Africa.
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