mineral

Aventurine

Quartz (SiO2) with fuchsite inclusions

Hardness: 7 on Mohs scale. Color: Green, blue, reddish-brown, yellow, or gray. Luster: Vitreous to greasy, characterized by aventurescence (a glistening or glittering effect caused by tiny platelike mineral inclusions). Crystal structure: Trigonal. Cleavage: None. Specific gravity: 2.64-2.69.

Hardness: 7 on Mohs scale
Color: Green, blue, reddish-brown, yellow, or gray

Identified August 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the regional metamorphism of rocks rich in quartz, or hydrothermally in quartz veins and pegmatites, where chromium-rich mica (fuchsite) becomes trapped within the growing quartz matrix.

Uses & applications

Commonly used in ornamental carvings, tumbling, jewelry, and spiritual or metaphysical practices as a stone of prosperity and luck.

Geological facts

The name aventurine derives from the Italian 'avventura', meaning 'by chance', referring to the accidental discovery of Italian glassmakers creating a similar glittering glass effect in the 18th century.

Field identification & locations

Easily identified by its distinctive glittery sheen (aventurescence) combined with a green color. Commonly found in India, Brazil, Russia, Austria, and Tanzania.