mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 7 Mohs; Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Pale to dark green with a shimmering effect
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.64-2.69
Formation & geological history
Formed in metamorphic rocks (phyllites and schists) and hydrothermal veins where silica-rich fluids cool. The green color comes from tiny mica platelets called Fuchsite that become trapped in the quartz as it crystallizes.
Uses & applications
Primarily used for decorative purposes, jewelry (beads, cabochons), ornamental carvings, and widely used in the metaphysical and gemstone collecting communities.
Geological facts
The shimmering effect seen in Aventurine is called 'aventurescence,' caused by the reflection of light from tiny platy mineral inclusions. While green is the most common color, it can also be found in blue, orange, and red/brown variants.
Field identification & locations
Identify by its characteristic shimmer (aventurescence) and grainy quartz texture. It is commonly found in India, Brazil, and Russia. Unlike jade, it will often have a visible 'sparkly' or granular interior when viewed under light.
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