mineral
Aventurine
Quartz with fuchsite inclusions (SiO2)
Hardness: 7 on Mohs scale. Color: Green, blue-green, silvery green. Luster: Vitreous to greasy, with a distinctive shimmering or glistening effect (aventurescence) caused by mineral inclusions. Crystal system: Trigonal.
- Hardness
- 7 on Mohs scale
- Color
- Green, blue-green, silvery green
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Physical properties
Hardness: 7 on Mohs scale. Color: Green, blue-green, silvery green. Luster: Vitreous to greasy, with a distinctive shimmering or glistening effect (aventurescence) caused by mineral inclusions. Crystal system: Trigonal.
Formation & geological history
Forms in metamorphic environments, particularly in quartz veins and pegmatites, often through hydrothermal activity and regional metamorphism where chromium-rich mica (fuchsite) becomes trapped within growing quartz.
Uses & applications
Commonly used in lapidary work, making tumbled stones, carvings, decorative objects, and occasionally in jewelry.
Geological facts
The shimmering effect known as 'aventurescence' is named after this mineral, derived from the Italian word 'avventura', meaning 'by chance', referring to the chance discovery of aventurine glass.
Field identification & locations
Can be identified in the field by its distinct pale to medium green color combined with a characteristic metallic or glittering sheen when turned in the light. Found worldwide including India, Brazil, Russia, and the USA.
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