mineral
Aventurine
Quartz with fuchsite inclusions (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: Pale green to dark green, sometimes blue or reddish-orange. Luster: Vitreous to greasy with a characteristic shimmering effect (aventurescence). Crystal structure: Trigonal. Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Pale green to dark green, sometimes blue or reddish-orange
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Physical properties
Hardness: 7 on Mohs scale. Color: Pale green to dark green, sometimes blue or reddish-orange. Luster: Vitreous to greasy with a characteristic shimmering effect (aventurescence). Crystal structure: Trigonal. Specific gravity: 2.65.
Formation & geological history
Forms through the hydrothermal alteration of quartz-rich rocks where mica or fuchsite flakes become trapped during crystal growth, typically in metamorphic environments or pegmatites.
Uses & applications
Used primarily for making tumbled stones, carvings, jewelry, and ornamental items.
Geological facts
The name comes from the Italian word 'all'avventura', meaning 'by chance', referring to the accidental discovery of glass with similar shimmering flakes in the 18th century.
Field identification & locations
Easily identified by its distinctive green color combined with a metallic glitter or sheen (aventurescence) caused by mineral inclusions. Commonly found in India, Brazil, Russia, and the United States.
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