mineral

Aventurine Quartz

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Hardness: 6.5-7 (Mohs); Color: Pale to medium green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69

Hardness: 6
Color: Pale to medium green
Luster: Vitreous to waxy

Identified February 5, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Pale to medium green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.64-2.69

Formation & geological history

Formed in magmatic rocks and metamorphic environments such as phyllites and schists where mica minerals crystallize alongside quartz over millions of years.

Uses & applications

Commonly used in jewelry such as beads, cabochons, and tumbled stones; also used for ornamental carvings, aquariums, and metaphysical healing practices.

Geological facts

The name comes from the Italian 'a ventura' meaning 'by chance,' referring to the discovery of goldstone glass which this mineral resembles due to its metallic-like inclusions.

Field identification & locations

Look for a translucent to opaque green stone with a shimmering effect called 'aventurescence' caused by mica platelets. Found in India, Brazil, and Russia. Identifying trait is its hardness combined with its distinct green hue.

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