metamorphic
Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Hardness: 6.5-7 on Mohs scale; Color: Green with silvery or platy inclusions; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific gravity: 2.64-2.69
- Hardness
- 6
- Color
- Green with silvery or platy inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Green with silvery or platy inclusions; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where mica inclusions (fuchsite) are trapped within the quartz matrix through heat and pressure.
Uses & applications
Commonly used for lapidary work, jewelry (beads, cabochons), ornamental carvings, and 'healing stones' in the metaphysical community.
Geological facts
The name 'Aventurine' comes from the Italian word 'a ventura', meaning 'by chance', originally referring to accidental adventuring glass rather than the stone itself.
Field identification & locations
Identify by its distinctive speckling or 'aventurescence' caused by light reflecting off internal mineral platelets. Usually found in large masses in Brazil, India, and Russia.
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