mineral

Aventurine

Aventurine Quartz (SiO2)

Hardness: 6.5-7 Mohs; Color: Green (due to Fuchsite inclusions); Luster: Vitreous to waxy; Crystal structure: Trigonal; Specific gravity: 2.64-2.69

Hardness: 6
Color: Green (due to Fuchsite inclusions)
Luster: Vitreous to waxy

Identified May 25, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Green (due to Fuchsite inclusions); Luster: Vitreous to waxy; Crystal structure: Trigonal; Specific gravity: 2.64-2.69

Formation & geological history

Formed in metamorphic rocks and igneous pegmatites. The characteristic aventurescence is caused by platy mineral inclusions like mica or fuchsite during crystallization.

Uses & applications

Widely used for ornamental carvings, jewelry beads, cabochons, and as a popular stone for crystal collecting and decorative vases.

Geological facts

The name comes from the Italian 'a ventura', meaning 'by chance', originally referring to 'aventurine glass' which was discovered by accident in the 18th century.

Field identification & locations

Identified by its 'aventurescence' (shimmering effect). Look for green translucent quartz that glitters when turned under a light source. Commonly found in India, Brazil, and Russia.