mineral

Aventurine

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

Hardness: 7 (Mohs scale); Color: Green with silvery or sparkly specks; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69

Hardness: 7 (Mohs scale)
Color: Green with silvery or sparkly specks
Luster: Vitreous to waxy

Identified June 22, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Green with silvery or sparkly specks; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69

Formation & geological history

Formed in metamorphic rocks (phyllites and schists) and occasionally in igneous rocks where heat and pressure recrystallize quartz together with chromium-rich mica (fuchsite) which provides the green tint.

Uses & applications

Widely used for ornamental carvings, tumble polishing for collecting, jewelry making (cabochons and beads), and as a popular 'healing crystal' in metaphysical practices.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance.' It refers to the accidental discovery of aventurine glass (goldstone) in the 18th century, which looks similar to this natural stone.

Field identification & locations

Identify by its 'aventurescence,' a shimmering effect caused by light reflecting off tiny platelets of mica within the stone. Commonly found in India, Brazil, and Russia. Unlike Jade, it often shows sparkles under light.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral