mineral

Green Aventurine

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

Hardness: 6.5-7 (Mohs scale); Color: Pale to dark green with a shimmering effect; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (cryptocrystalline); Cleavage: None; Specific gravity: 2.64-2.69

Hardness: 6
Color: Pale to dark green with a shimmering effect
Luster: Vitreous to waxy

Identified March 15, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic environments where quartz-rich sediments or magmatic deposits are subjected to intense heat and pressure. The green color and 'aventurescence' (sparkling effect) are caused by platy inclusions of green chromium-rich mica called fuchsite.

Uses & applications

Primarily used for lapidary work, jewelry (beads, cabochons), ornamental carvings, and 'healing' stone collections. It is a common material for tumbled stones and worry stones.

Geological facts

The name 'Aventurine' comes from the Italian 'a ventura', meaning 'by chance'. This refers to the 18th-century accidental discovery of 'Goldstone' (Italian glass), which shares a similar glittering appearance to the natural mineral.

Field identification & locations

Identify in the field by its distinct shimmering green color and grainy quartz texture. It is commonly found in India, Brazil, Russia, and Tanzania. Unlike jade, it will often show a granular, sandy texture under magnification and tiny reflective spangles of mica.

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