mineral

Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.69; Sparkly appearance (aventurescence).

Hardness: 6
Color: Green
Luster: Vitreous to waxy

Identified July 6, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Green; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.69; Sparkly appearance (aventurescence).

Formation & geological history

Formed in metamorphic rocks and magmatic environments where mica and quartz are under high pressure. The green color comes from tiny mica flakes (fuchsite) trapped within the quartz grain matrix.

Uses & applications

Widely used in jewelry (beads, cabochons), ornamental carvings, figurines, and as a popular stone for gem collectors and metaphysical enthusiasts.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental discovery of aventurine glass in the 18th century. Most green aventurine is sourced from India.

Field identification & locations

Identify by its characteristic 'aventurescence'—a shimmering effect caused by platy mineral inclusions. Commonly found in India, Brazil, and Russia. Used as a budget-friendly alternative to jade.