mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 6.5-7 on Mohs scale. Color: Pale to dark green with a shimmering effect (aventurescence). Luster: Vitreous to waxy. Crystal Structure: Trigonal (often found in massive form).
- Hardness
- 6
- Color
- Pale to dark green with a shimmering effect (aventurescence)
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Pale to dark green with a shimmering effect (aventurescence). Luster: Vitreous to waxy. Crystal Structure: Trigonal (often found in massive form).
Formation & geological history
Formed in metamorphic rocks and magmatic environments where tectonic pressure and heat allow for the development of quartz with mica inclusions. Commonly found in Precambrian or Paleozoic formations.
Uses & applications
Widely used for ornamental carvings, jewelry (cabochons and beads), landscaping stones, and as a popular specimen for crystal collecting and metaphysical practices.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura,' meaning 'by chance,' originally referring to 'Italian glass' discovered accidentally that had a similar shimmer. The green color specifically comes from the presence of chromium-rich Fuchsite mica.
Field identification & locations
Identify by its characteristic green color and 'aventurescence,' which is the sparkly glitter effect caused by light reflecting off tiny mineral inclusions. Major deposits are found in India (where it is sometimes called Indian Jade), Brazil, and Russia.
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