metamorphic
Green Aventurine
Silicon Dioxide (SiO2 with Fuchsite inclusions)
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy with aventurescence (shimmering effect); Crystal Structure: Hexagonal (Trigonal); Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 7 Mohs
- Color
- Pale to medium green
- Luster
- Vitreous to waxy with aventurescence (shimmering effect)
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Physical properties
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy with aventurescence (shimmering effect); 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 crystals (usually green fuchsite) are trapped within the quartz matrix during recrystallization.
Uses & applications
Used primarily in jewelry as beads and cabochons, ornamental carvings, aquarium decor, and as popular 'healing' stones in metaphysical practices.
Geological facts
The name Aventurine comes from the Italian 'a ventura,' meaning 'by chance,' which originally referred to a type of shimmering glass accidentally discovered in Venice during the 18th century.
Field identification & locations
Identify by its characteristic green 'schiller' or shimmer caused by platy mineral inclusions. It is distinct from jade by its lower toughness and visible shimmering particles when rotated under light.
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