Mineral

Green Aventurine

Silicon Dioxide (Quartz) with inclusions (SiO₂)

Hardness: 6.5–7 (Mohs scale), Color: Pale to deep green with sparkly inclusions (aventurescence), Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.64–2.69

Hardness: 6

Identified March 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic environments where quartz-rich rocks undergo high pressure and heat, allowing for the inclusion of Fuchsite (green mica) crystals. Geological ages vary greatly depending on the surrounding formation, ranging from Precambrian to more recent eras.

Uses & applications

Used primarily in jewelry (beads, cabochons), carvings, decorative ornaments, and for lapidary tumbling. In industry, it is occasionally used as an abrasive or in construction as a decorative stone.

Geological facts

Aventurine is famous for its 'aventurescence,' a shimmering effect caused by platy mineral inclusions like mica or fuchsite. The name is derived from the Italian 'a ventura,' meaning 'by chance,' after the discovery of goldstone glass in the 18th century which shared its look.

Field identification & locations

Identify by its characteristic sea-green color and subtle sparkles. It can be distinguished from Jade by its higher hardness and lower density. Common locations include India, Brazil, Russia, and Tanzania. Collectors look for uniform color and strong 'aventurescence' when selecting specimens.

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