mineral

Green Aventurine

Aventurine Quartz (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Hardness: 6.5-7 (Mohs scale); Color: Green with silvery or green shimmer (aventurescence); Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal); Cleavage: None; Specific Gravity: 2.64-2.69

Hardness: 6
Color: Green with silvery or green shimmer (aventurescence)
Luster: Vitreous to waxy

Identified March 21, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic environments (primarily quartzites and schists) where quartz crystallizes alongside chromium-rich fuchsite mica. Formation occurs over millions of years under high pressure and temperature.

Uses & applications

Predominantly used for ornamental purposes, including beads, cabochons, figurines, and tumbled stones for gemstone collecting. Occasionally used for building facades or aquarium decor.

Geological facts

The name 'Aventurine' comes from the Italian word 'a ventura,' meaning 'by chance,' referencing the discovery of aventurine glass (goldstone) in the 18th century, which looks similar to this natural stone.

Field identification & locations

Identify in the field by its distinct platy mica inclusions which cause a shimmering effect under light. Commonly found in India, Brazil, Russia, and Tanzania. Collectors look for even color distribution and strong sparkle.

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