metamorphic
Rough Green QuartzITE / Green Aventurine
Aventurine Quartz (SiO2 + Cr-muscovite inclusions)
Hardness: 7 on Mohs scale. Color: Pale to mint green. Luster: Vitreous to waxy. Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.64-2.69.
- Hardness
- 7 on Mohs scale
- Color
- Pale to mint green
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale. Color: Pale to mint green. Luster: Vitreous to waxy. Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.64-2.69.
Formation & geological history
Formed from the metamorphism of quartz-rich sandstone. The green color usually comes from platy inclusions of fuchsite (a chromium-rich mica) that were incorporated into the rock during recrystallization under intense heat and pressure.
Uses & applications
Commonly used for ornamental carvings, tumble polishing, cabochons for jewelry, and as a decorative stone in landscaping. It is also popular in the metaphysical community as a 'stone of opportunity'.
Geological facts
Aventurine exhibits a unique shimmering effect known as 'aventurescence,' caused by light reflecting off tiny mineral inclusions within the quartz. While usually green, it can also be found in orange, brown, and blue.
Field identification & locations
Identify in the field by its greenglassy appearance, lack of cleavage, and ability to scratch glass easily. It is commonly found in India, Brazil, Russia, and parts of Africa.
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