mineral

Green Aventurine

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

Hardness: 6.5 - 7 on Mohs scale; Color: Translucent to opaque green with shimmering flecks; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6 - 2.7

Hardness: 6
Color: Translucent to opaque green with shimmering flecks
Luster: Vitreous to waxy

Identified July 16, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic rocks such as phyllites and schists where quartz recrystallizes under heat and pressure alongside mica minerals like chromium-rich fuchsite, which gives it the green color.

Uses & applications

Widely used in jewelry making, ornamental carvings, tumbling, and as a popular 'healing crystal' in metaphysical practices.

Geological facts

The name Aventurine comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental discovery of aventurine glass in the 18th century. The natural mineral exhibits 'aventurescence', a glittering effect caused by light reflecting off tiny platelets of mica.

Field identification & locations

Look for a green quartz-like stone with a distinct internal shimmer. Common locations include India and Brazil. Collectors should check for the presence of mica inclusions rather than a solid uniform color to distinguish it from jade or dyed chalcedony.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

sedimentary

Schist

Metamorphic

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

mineral

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Mineral

Nephrite Jade

Nephrite

Mineral/Rock