mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69. Displays aventurescence.
- Hardness
- 7 Mohs
- Color
- Pale to medium green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 Mohs; Color: Pale to medium green; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69. Displays aventurescence.
Formation & geological history
Formed in metamorphic rocks and magmatic environments. It is a form of quartzite containing platy mineral inclusions like green fuchsite mica which provide the color and shimmer.
Uses & applications
Primarily used in jewelry for cabochons, beads, and carvings. Also used as decorative stones in landscaping and aquarium ornaments. Popular in metaphysical collections.
Geological facts
The name Aventurine comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental discovery of aventurine glass in the 18th century. Most natural green aventurine comes from India.
Field identification & locations
Identify by its characteristic 'aventurescence' (shimmer) caused by mica inclusions. It is harder than glass and lacks the bubble inclusions found in green glass imitations. Common in India and Brazil.
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