metamorphic
Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
Hardness: 6.5-7 (Mohs); Color: Green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69; Features a shimmering effect known as aventurescence.
- Hardness
- 6
- Color
- Green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69; Features a shimmering effect known as aventurescence.
Formation & geological history
Forms in metamorphic rocks such as phyllites and schists where quartz and mica recrystallize under intense pressure and heat. Primarily associated with the movement of silica-rich hydrothermal fluids.
Uses & applications
Widely used for decorative carvings, palm stones, beads, cabochons for jewelry, and as a popular specimen for metaphysical crystal collections.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to Venetian glass made with copper filings that looked similar to this natural stone.
Field identification & locations
Identify by its distinctive shimmering green surface caused by tiny plate-like inclusions of green fuchsite mica. Commonly found in India, Brazil, and Russia. It is often mistaken for jade but is much harder.
