metamorphic
Green Aventurine
Aventurine Quartz (SiO2) with Fuchsite inclusions
Hardness: 7 (Mohs), Color: Shimmering green, Luster: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None, Specific Gravity: 2.64-2.69. Displays aventurescence.
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Physical properties
Hardness: 7 (Mohs), Color: Shimmering green, Luster: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None, Specific Gravity: 2.64-2.69. Displays aventurescence.
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where mica crystals (fuchsite) align to create a shimmering effect. Most deposits date back to the Proterozoic era.
Uses & applications
Widely used for ornamental carvings, jewelry (cabochons and beads), decorative indoor landscaping, and as a popular gemstone in the holistic healing community.
Geological facts
The shimmering effect is called 'aventurescence,' caused by platy inclusions of green chrome-mica. The name 'aventurine' comes from the Italian 'a ventura,' meaning 'by chance.'
Field identification & locations
Identified by its sparkly green appearance and typical quartzite texture. It is commonly found in India, Brazil, Russia, and Austria. Unlike glass imitations, it will scratch common glass.
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