mineral
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
Hardness of 7 on the Mohs scale, pale to dark green color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, pale to dark green color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Forms in metamorphic environments, specifically regional or contact metamorphism of quartz-rich sandstones and quartz veins, where chromium-rich mica (fuchsite) gets incorporated during crystallization.
Uses & applications
Used primarily for carving ornamental objects, tumbled stones, jewelry, and polished palm stones.
Geological facts
The distinctive sparkly or glistening effect (known as aventurescence) is caused by the reflection of light from tiny flat mineral inclusions like fuchsite or hematite inside the quartz.
Field identification & locations
Identified by its characteristic green color combined with a subtle metallic glitter or shimmer under direct light and a hardness that easily scratches glass. Commonly found in India, Brazil, Russia, and Austria.
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