mineral
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
Hardness: 7 on the Mohs scale. Color: Light to dark green, often with a shimmering or glittering effect known as aventurescence. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None. Specific gravity: 2.64-2.69.
- Hardness
- 7 on the Mohs scale
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on the Mohs scale. Color: Light to dark green, often with a shimmering or glittering effect known as aventurescence. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None. Specific gravity: 2.64-2.69.
Formation & geological history
Forms in metamorphic environments, primarily as a quartzite rock where silica-rich solutions precipitate quartz, incorporating tiny flakes of green mica (fuchsite) which give it its characteristic color and sparkle.
Uses & applications
Widely used for ornamental carvings, polished stones, beads, jewelry, and in metaphysical practices.
Geological facts
The shimmering effect in aventurine is caused by tiny metallic inclusions, a phenomenon called aventurescence. The name comes from the Italian word 'avventura', meaning 'by chance'.
Field identification & locations
Can be identified by its distinctive green color combined with a glittering metallic sheen under light and a Mohs hardness of 7. Commonly sourced from India, Brazil, Russia, and the United States.
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