mineral

Aventurine

Quartz with fuchsite inclusions (SiO2)

Hardness: 7 on Mohs scale. Color: Pale green to dark green, sometimes blue or reddish-orange. Luster: Vitreous to greasy with a characteristic shimmering effect (aventurescence). Crystal structure: Trigonal. Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Pale green to dark green, sometimes blue or reddish-orange

Identified July 31, 2026More mineral →

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Physical properties

Formation & geological history

Forms through the hydrothermal alteration of quartz-rich rocks where mica or fuchsite flakes become trapped during crystal growth, typically in metamorphic environments or pegmatites.

Uses & applications

Used primarily for making tumbled stones, carvings, jewelry, and ornamental items.

Geological facts

The name comes from the Italian word 'all'avventura', meaning 'by chance', referring to the accidental discovery of glass with similar shimmering flakes in the 18th century.

Field identification & locations

Easily identified by its distinctive green color combined with a metallic glitter or sheen (aventurescence) caused by mineral inclusions. Commonly found in India, Brazil, Russia, and the United States.