metamorphic
Green Aventurine (worked as a bead/sphere)
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale to dark green with a shimmering effect
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where interstitial mica (fuchsite) provides the characteristic green color and aventurescence.
Uses & applications
Primarily used in jewelry (beads, cabochons), ornamental carvings, and as a popular stone in the gemstone collecting and metaphysical communities.
Geological facts
The shimmering effect known as 'aventurescence' is caused by tiny plate-like inclusions of green fuchsite mica within the quartz matrix. The name 'aventurine' comes from 'a ventura', meaning 'by chance'.
Field identification & locations
Commonly found in India, Brazil, and Russia. Identified in the field by its distinct green color and the 'sparkle' or shimmer visible under bright light that distinguishes it from jade or chalcedony.
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