metamorphic
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 (Mohs scale), Color: Pale to deep green with a shimmering effect (aventurescence), Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Specific Gravity: 2.64-2.69
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Physical properties
Hardness: 7 (Mohs scale), Color: Pale to deep green with a shimmering effect (aventurescence), Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Specific Gravity: 2.64-2.69
Formation & geological history
Formed as a metamorphic quartzite that contains platy mineral inclusions like chromium-rich mica (fuchsite). It originates in metamorphic environments where quartz is subject to high heat and pressure.
Uses & applications
Commonly used for jewelry, ornamental carvings, tumbling, and as a popular stone for chakra healing and metaphysical collectors.
Geological facts
The shimmering effect, known as aventurescence, is caused by tiny mica inclusions reflecting light. The name comes from the Italian 'a ventura,' meaning 'by chance.'
Field identification & locations
Identify by its distinct green color and the subtle metallic shimmer when rotated under light. Common locations include India, Brazil, Russia, and Austria.
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