mineral
Tumbled Aventurine
Silicon Dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 Mohs; Color: Green to bluish-green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Specific Gravity: 2.64-2.69. Known for aventurescence luster.
- Hardness
- 7 Mohs
- Color
- Green to bluish-green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Green to bluish-green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Specific Gravity: 2.64-2.69. Known for aventurescence luster.
Formation & geological history
Formed in magmatic and metamorphic environments where quartz crystallizes alongside chromium-rich mica (fuchsite) which provides the green pigment.
Uses & applications
Used extensively in jewelry, ornamental carvings, beads, and as a popular stone for collectors and chakra healing practitioners.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', referring to the accidental discovery of aventurine glass around the 18th century.
Field identification & locations
Identified by its sparkly metallic glitters (aventurescence) and grainy quartz texture. Commonly found in India, Brazil, and Russia. Collectors should look for even color and high opacity.
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