mineral
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
Hardness 6.5-7 on the Mohs scale. Luster is vitreous to waxy. Color is medium forest green with a slight shimmering effect (aventurescence). Trigonal crystal system with a conchoidal fracture and splintery cleavage.
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Physical properties
Hardness 6.5-7 on the Mohs scale. Luster is vitreous to waxy. Color is medium forest green with a slight shimmering effect (aventurescence). Trigonal crystal system with a conchoidal fracture and splintery cleavage.
Formation & geological history
Forms in metamorphic rocks such as mica schists and quartzites, as well as in hydrothermal veins. The presence of green fuchsite mica inclusions gives it its characteristic color and glitter.
Uses & applications
Widely used for ornamental carvings, gemstone beads, cabochons, polished decorative items, and popular in metaphysical and crystal collecting communities.
Geological facts
The name Aventurine comes from the Italian word 'a ventura', meaning 'by chance', referring to the accidental discovery of aventurine glass (goldstone) in the 18th century.
Field identification & locations
Identified by its distinctive shimmering green surface effect (aventurescence) and quartz hardness. Major sources include India, Brazil, Russia, and South Africa.
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