mineral

Aventurine

Quartz (Variety Aventurine), SiO2

Hardness of 7 on the Mohs scale, pale to dark green color (due to fuchsite inclusions), vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.

Identified August 5, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, pale to dark green color (due to fuchsite inclusions), vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.

Formation & geological history

Formed in metamorphic environments, particularly quartzites and schists, through regional or contact metamorphism where chromium-rich micas (like fuchsite) were incorporated during quartz crystallization.

Uses & applications

Used in carving, ornamental objects, tumbled stones, jewelry, and crystal healing.

Geological facts

The name comes from the Italian 'avventura', meaning 'by chance', referring to the accidental discovery of Italian glass-making techniques that produced a similar sparkly effect in the 18th century.

Field identification & locations

Identified by its distinctive translucent green color and shimmering metallic glitter (aventurescence) caused by tiny mineral inclusions. Found worldwide including India, Brazil, Russia, and Austria.