mineral

Green Aventurine

Quartz variant (SiO2) with Fuchsite inclusions

Hardness: 6.5–7 Mohs; Color: Pale to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64–2.69; Notable for its 'aventurescence' (metallic glisten).

Hardness: 6
Color: Pale to deep green
Luster: Vitreous to waxy

Identified June 2, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in metamorphic rocks like phyllites and schists, or in hydrothermal veins where quartz crystallizes with mica inclusions. Common in Precambrian deposits.

Uses & applications

Used extensively in jewelry (cabochons, beads), decorative carvings, aquarium gravel, and as a 'healing stone' in alternative medicine practices.

Geological facts

The name 'Aventurine' comes from the Italian word 'a ventura', meaning 'by chance', originally referring to the accidental discovery of aventurine glass (goldstone) in the 18th century.

Field identification & locations

Identify by its characteristic green shimmer caused by platy chrome-mica (fuchsite). Found mostly in India, Brazil, and Russia. It can be distinguished from jade by its lower toughness and visible internal speckling.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

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Nephrite Jade

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

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