mineral
Aventurine (Green Quartz)
Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Hardness: 6.5-7 (Mohs); Color: Green with mottled inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal; Specific gravity: 2.64-2.69; Features: Aventuressence (sparkling effect)
- Hardness
- 6
- Color
- Green with mottled inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Green with mottled inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal; Specific gravity: 2.64-2.69; Features: Aventuressence (sparkling effect)
Formation & geological history
Formed as a metamorphic rock (quartzite) or within igneous veins where quartz contains inclusions of Fuchsite (green mica). Found in high-grade metamorphic environments.
Uses & applications
Commonly used for lapidary work, jewelry (beads, cabochons), ornamental carvings, and as a popular stone for meditation and crystal collecting.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to the accidental discovery of goldstone glass which this mineral resembles.
Field identification & locations
Identify by its characteristic green color and shimmering internal mica flakes. Often found in riverbeds or mountain outcroppings in India, Brazil, and Russia.
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