metamorphic
Green Aventurine
Silicon dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7.0 (Mohs); Color: Pale to dark green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.69. It displays a shimmering effect called aventurescence.
- Hardness
- 6
- Color
- Pale to dark green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7.0 (Mohs); Color: Pale to dark green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.69. It displays a shimmering effect called aventurescence.
Formation & geological history
Formed as a metamorphic rock (quartzite) where quartz is fused under intense heat and pressure, with high mica (fuchsite) content providing the green color and shimmer. Most specimens are from the Proterozoic or Paleozoic eras.
Uses & applications
Widely used in jewelry (cabochons, beads), decorative figurines, carvings, as a healing crystal in metaphysical practices, and occasionally for interior design accents.
Geological facts
The name comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental aventurine glass discovery in Murano during the 18th century. It is known as the 'Stone of Opportunity'.
Field identification & locations
Identify by its characteristic green color and the 'sparkly' mica platelets within the stone. Commonly found in India, Brazil, and Russia. For collectors, look for deep green color and consistent 'shimmer' across the surface.
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