metamorphic
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
Hardness: 6.5-7 Mohs; Color: Pale green to silvery green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (massive); Cleavage: None; Specific Gravity: 2.6-2.7
- Hardness
- 6
- Color
- Pale green to silvery green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Pale green to silvery green; Luster: Vitreous to waxy; Crystal Structure: Trigonal (massive); Cleavage: None; Specific Gravity: 2.6-2.7
Formation & geological history
Formed through the metamorphism of quartz-rich sedimentary rocks (quartzite) where mica minerals (like fuchsite) crystallize within the quartz matrix, creating the characteristic 'aventurescence' effect.
Uses & applications
Primarily used for ornamental carvings, beads, jewelry, cabochons, and as a popular stone for mineral collectors and metaphysical practitioners.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental glass discovery in the 18th century that looked similar to this natural stone.
Field identification & locations
Identify by its 'shimmery' appearance when rotated under light, known as aventurescence. Commonly found in India, Brazil, and Russia. Field identification relies on hardness and the presence of green mica flakes.
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