mineral

Aventurine (Green)

Aventurine Quartz (SiO2 + Fuchsite inclusions)

Hardness: 6.5-7 (Mohs scale); Color: Pale to medium green with 'aventurescence'; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.64-2.69

Hardness: 6
Color: Pale to medium green with 'aventurescence'
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Pale to medium green with 'aventurescence'; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.64-2.69

Formation & geological history

Formed in metamorphic rocks and magmatic veins where quartz crystallizes and incorporates chromium-rich mica (fuchsite) platelets, which give it the green color and signature shimmer.

Uses & applications

Predominantly used for lapidary work including figurines, cabochons for jewelry, tumbled stones, and occasionally as an ornamental building material or aquarium gravel.

Geological facts

The name comes from the Italian 'a ventura,' meaning 'by chance,' referring to the accidental discovery of goldstone (a Venetian glass substitute) which looks similar. It is often called the 'Stone of Opportunity.'

Field identification & locations

Identify in the field by its distinct platy shimmer (aventurescence) when rotated under light, which distinguishes it from jade. Commonly found in India, Brazil, and Russia. Collectors should look for even color and high sparkle.

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