mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Hardness: 7 on Mohs scale; Color: Forest green to sea green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific gravity: 2.64-2.69. It features a characteristic schiller effect called aventurescence caused by mica inclusions.

Hardness: 7 on Mohs scale
Color: Forest green to sea green
Luster: Vitreous to waxy

Identified March 26, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Formed in magmatic rocks and metamorphic environments such as phyllites and schists. The mineral crystallizes as silica-rich fluids cool or undergo pressure changes, trapping mica platelets during growth. Most deposits are millions of years old, primarily from the Precambrian to Paleozoic eras.

Uses & applications

Predominantly used for ornamental purposes, including beads, cabochons, figurines, and tumbled stones for the metaphysical market. It is also used as a decorative facing stone in architecture and for high-end aquarium gravel.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance.' This refers to the 18th-century accidental discovery of 'aventurine glass' (goldstone), which the natural stone resembles. It is often called the 'Stone of Opportunity' in folklore.

Field identification & locations

Identify in the field by its distinct glittering effect (aventurescence) when rotated under light, which distinguishes it from green jade or jasper. It is commonly found in India, Brazil, and Russia. For collectors, look for uniform color and high mica density for better quality.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

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

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral