metamorphic

Aventurine Quartz

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Pale green to forest green; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.64-2.69; Notable for its 'aventurescence' (shimmering effect).

Hardness: 6
Color: Pale green to forest green
Luster: Vitreous to waxy

Identified May 30, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed in metamorphic environments where quartz sandstone is subjected to heat and pressure. The green color is a result of chromium-rich fuchsite mica inclusions aligning within the quartz matrix. Can also occur in igneous rocks through hydrothermal processes.

Uses & applications

Commonly used for decorative carvings, jewelry (cabochons and beads), landscaping stones, and as a popular specimen for crystal healing and metaphysical collections.

Geological facts

The name 'aventurine' comes from the Italian word 'a ventura', meaning 'by chance', originally referring to accidental discoveries of aventurine-like glass in the 18th century. It is often mistaken for jade due to its color.

Field identification & locations

Identify by its characteristic green color and shimmering mica flakes beneath the surface. It is commonly found in India, Brazil, and Russia. When found in the field, look for a grainy, quartzite-like texture with sparkly greenish surface layers.