metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness: 6.5 to 7 on Mohs scale; Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal; Specific gravity: 2.64-2.69; Features 'aventurescence' (a shimmering effect).
- Hardness
- 6
- Color
- Pale to deep green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5 to 7 on Mohs scale; Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal; Specific gravity: 2.64-2.69; Features 'aventurescence' (a shimmering effect).
Formation & geological history
Formed through the metamorphism of quartz-rich sedimentary rocks (sandstone) where mica-rich minerals like chrome-bearing fuchsite crystallize within the quartz matrix, providing the signature green color and sparkle.
Uses & applications
Commonly used for ornamental carvings, figurines, jewelry beads, cabochons, and landscape decor. It is also a very popular 'healing stone' in metaphysical communities.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance.' This is a reference to the accidental discovery of aventurine glass (goldstone) in the 18th century, which looks very similar to this natural stone.
Field identification & locations
Identify in the field by its distinct green color and the presence of tiny sparkling plate-like inclusions. It is primarily found in India (notably the Karnataka region), Brazil, Russia, and Austria.
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