mineral

Green Aventurine

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

Hardness: 7 on Mohs scale; Color: Dull to forest green with silvery-green speckles; Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None; Specific Gravity: 2.64-2.69

Hardness: 7 on Mohs scale
Color: Dull to forest green with silvery-green speckles
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 7 on Mohs scale; Color: Dull to forest green with silvery-green speckles; Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None; Specific Gravity: 2.64-2.69

Formation & geological history

Formed in magmatic and metamorphic environments where tectonic pressure and hydrothermal fluids allow quartz and mica to crystallize together over millions of years, often in ancient shield regions.

Uses & applications

Predominantly used for ornamental purposes, carvings, jewelry (cabochons and beads), and as a popular semi-precious stone for metaphysical and crystal collecting.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' referring to the accidental 18th-century discovery of aventurine glass (Goldstone) which looked similar to this natural stone.

Field identification & locations

Identified in the field by its distinct 'aventurescence,' which is a glittering or shimmering effect caused by platy mineral inclusions (usually mica or fuchsite). Commonly found in India, Brazil, and Russia.

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