mineral
Green Aventurine
Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 (Mohs); Color: Green with a shimmering effect; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.63 - 2.65
- Hardness
- 7 (Mohs)
- Color
- Green with a shimmering effect
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 (Mohs); Color: Green with a shimmering effect; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.63 - 2.65
Formation & geological history
Formed in metamorphic environments where quartz-rich sediment is subjected to heat and pressure, allowing mica inclusions to align and create the characteristic 'aventurescence'.
Uses & applications
Commonly used for lapidary work, jewelry, decorative carvings, and as a popular stone for chakra healing and metaphysical collections.
Geological facts
The shimmering effect is called aventurescence, which is caused by tiny platelike inclusions of green mica called fuchsite. Its name is derived from the Italian 'a ventura', meaning 'by chance'.
Field identification & locations
Identify by its characteristic green color and internal glitter-like sparkles. Found primarily in India, Brazil, and Russia. It is often mistaken for nephrite jade but is harder and has a granular texture.
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Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
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Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
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Mineral/Rock