metamorphic
Raw Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite)
Hardness: 7 Mohs; Color: Pale to dark green with a grainy texture; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoïdal fracture); Specific gravity: 2.6 - 2.8
- Hardness
- 7 Mohs
- Color
- Pale to dark green with a grainy texture
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to dark green with a grainy texture; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoïdal fracture); Specific gravity: 2.6 - 2.8
Formation & geological history
Forms in regional metamorphic environments where quartz-rich sediments are subjected to heat and pressure. The green color is derived from inclusions of chromium-rich mica called fuchsite.
Uses & applications
Used primarily for lapidary work, cabochons, decorative carvings, landscaping stones, and as a popular 'healing' crystal in the metaphysical community.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' referencing the discovery of aventurine glass or goldstone in the 18th century. It is known for its 'aventurecence' (shimmering effect).
Field identification & locations
Identify in the field by its hardness (scratches glass), green grainy appearance, and subtle shimmer under light. Commonly found in India, Brazil, and Russia.
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