metamorphic
Green Aventurine
Silicon Dioxide (SiO2 with Fuchsite inclusions)
Hardness: 6.5-7 on Mohs scale; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale to dark green with a shimmering effect (aventurescence)
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Pale to dark green with a shimmering effect (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69
Formation & geological history
Formed as a metamorphic rock (quartzite) through the heat and pressure of earth movement, where mica or fuchsite inclusions are trapped within the quartz during recrystallization.
Uses & applications
Primarily used for lapidary work, jewelry (cabochons and beads), ornamental carvings, and it is highly popular in the metaphysical and crystal collecting communities.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental adventurine glass production in the 18th century. It is known for its shimmering effect called aventurescence.
Field identification & locations
Identify in the field by its green color and distinct metallic speckles (fuchsite mica) that reflect light. It is commonly found in India (the largest producer), Brazil, Russia, and Austria.
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