metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Muscovite/Fuchsite)
Hardness: 6.5-7 (Mohs); Color: Green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.64-2.69. Famous for its aventurescence, a shimmering effect.
- Hardness
- 6
- Color
- Green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.64-2.69. Famous for its aventurescence, a shimmering effect.
Formation & geological history
Formed through the regional metamorphism of sandstone into quartzite, where mica inclusions (fuchsite) align to create a shimmering effect. Often found in Precambrian formations.
Uses & applications
Primarily used for lapidary work, jewelry (cabochons and beads), ornamental carvings, figurines, and as a popular stone for crystal healing and mineral collecting.
Geological facts
The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' referring to the discovery of aventurine glass or goldstone in the 18th century. Most natural green aventurine is found in India.
Field identification & locations
Identify in the field by its green color and 'aventurescence' (internal metallic glint). Commonly found in India, Brazil, Russia, and Austria. Distinguish from jade by its lower density and shimmering inclusions.
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