metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Translucent green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69

Hardness: 6
Color: Translucent green
Luster: Vitreous to waxy

Identified June 7, 2026More metamorphic →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Translucent green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64-2.69

Formation & geological history

Formed through the regional metamorphism of sandstone into quartzite, where mica crystals (fuchsite) are trapped within the quartz matrix, creating the characteristic green shimmer known as aventurescence. Primarily found in Precambrian shield areas.

Uses & applications

Used extensively in jewelry for beads, cabochons, and carvings. Also used as a decorative stone in aquariums, gardens, and countertop surfaces.

Geological facts

The name 'aventurine' comes from the Italian 'a ventura,' meaning 'by chance,' referencing the accidental discovery of aventurine glass in the 18th century which looked similar to this natural stone.

Field identification & locations

Identify by its 'shimmer' or 'glitter' caused by mica inclusions (aventurescence). It is commonly found in India, Brazil, and Russia. Collectors should look for a uniform green color and a strong shimmering effect.