mineral

Aventurine

Aventurine Quartz (SiO2)

Hardness: 6.5-7 (Mohs), Color: Green (due to Fuchsite inclusions), Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None, Specific Gravity: 2.64-2.69

Hardness: 6

Identified June 30, 2026More mineral →

Explore Aventurine in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 (Mohs), Color: Green (due to Fuchsite inclusions), Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None, Specific Gravity: 2.64-2.69

Formation & geological history

Formed in magmatic rocks, hydrothermal veins, and metamorphic rocks. The green variety occurs when quartz is infused with tiny particles of chrome-rich mica (fuchsite) during the crystallization process.

Uses & applications

Commonly used for ornamental carvings, jewelry (beads, cabochons), countertops, and as a popular stone for crystal collectors and metaphysical practitioners.

Geological facts

Aventurine displays a unique optical phenomenon called 'aventurescence', which is a glittering or shimmering effect caused by platy mineral inclusions. Its name is derived from the Italian 'a ventura', meaning 'by chance'.

Field identification & locations

Identify in the field by its green color and distinct internal shimmering scale-like inclusions. It is frequently found in India, Brazil, and Russia. Collectors look for uniform color and strong 'sparkle'.