Rock Identifier
Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral
mineral

Green Aventurine

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

Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69

Hardness
6
Color
Pale to dark green with a shimmering effect
Luster
Vitreous to waxy
Identified More mineral →

Identify your own rocks.

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

App StoreGoogle Play

Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.69

Formation & geological history

Formed in metamorphic rocks (schist) and through hydrothermal processes. The green color is primarily caused by platy inclusions of mica (fuchsite) trapped within the quartz as it crystallizes. It is found in various geological layers spanning the Proterozoic to recent eras.

Uses & applications

Used widely in lapidary work for cabochons, beads, and tumbled stones. Also used for ornamental carvings, household decor items, and as a popular stone for metaphysical collecting.

Geological facts

Green Aventurine is best known for its 'aventurescence,' a optical phenomenon where the mica inclusions reflect light like tiny sparkles. It is often called the 'Stone of Opportunity' in folklore.

Field identification & locations

Identify by its characteristic green shimmer (aventurescence) and quartz-like hardness. Frequently found in India, Brazil, Russia, and Tanzania. Unlike jade, it has a granular texture under magnification due to the quartz grains.

More like this

Other mineral specimens

Sandstone (with potential mineral staining/concretions) (Arenite (SiO2 based)) — sedimentary

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

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

Epidote

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

metamorphic
Nephrite Jade (Nephrite) — Mineral/Rock

Nephrite Jade

Nephrite

Mineral/Rock
Banded Gneiss (River Rock/Pebble) (Gneiss (specifically a banded variety often found as a river rock)) — Metamorphic 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

Green Apatite on Albite

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

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

Epidote

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

mineral