mineral

Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Hardness: 6.5-7 (Mohs scale); Color: Light to medium green with shimmering inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.64-2.69; Notable for 'aventurescence' (glittery effect).

Hardness: 6
Color: Light to medium green with shimmering inclusions
Luster: Vitreous to waxy

Identified June 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed in igneous or metamorphic rocks when mica or other mineral inclusions crystallize within quartz. The green color is typically caused by platy inclusions of chromium-rich fuchsite mica. Geologically found in precambrian to recent formations.

Uses & applications

Extremely popular for lapidary work, jewelry (beads, cabochons), carvings, decorative figurines, and as a 'healing stone' in metaphysical practices.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', referring to the accidental discovery of aventurine glass or 'goldstone' in the 18th century which looked similar to this natural stone.

Field identification & locations

Identify by looking for 'aventurescence'—a metallic glitter caused by flat mineral inclusions. Common in India, Brazil, Russia, and Austria. Unlike nephrite jade, aventurine has a granular, mica-filled texture and higher translucency.