mineral

Green Quartz (Aventurine)

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

Hardness: 6.5-7 on Mohs scale; Color: Pale to medium green with 'aventurescence'; Luster: Vitreous to waxy; Crystal Structure: Trigonal (hexagonal system); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.64-2.69

Hardness: 6
Color: Pale to medium green with 'aventurescence'
Luster: Vitreous to waxy

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed in magmatic and metamorphic environments, specifically within pegmatites or metamorphic rocks where mica is present. The green color is primarily due to inclusions of chrome-rich fuchsite mica.

Uses & applications

Predominantly used for lapidary work including tumbled stones, beads, figurines, and cabochons. It is also a popular specimen for metaphysical collectors and landscape architecture.

Geological facts

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

Field identification & locations

Look for a shimmering or glinting effect (aventurescence) when rotated under light, caused by platy mineral inclusions. It is commonly found in India, Brazil, and Russia. Unlike jade, it is often more translucent and has visible graininess.

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