mineral

Aventurine (Green Quartz)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)

Hardness: 6.5-7.0 (Mohs scale); Color: Light to dark green; Luster: Vitreous to waxy; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.64-2.69; Aventurescence: Metallic glitter caused by mica inclusions.

Hardness: 6
Color: Light to dark green
Luster: Vitreous to waxy

Identified February 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic environments and certain igneous rocks where hydrothermal fluids allow for the crystallization of quartz mixed with mica particles; primarily found in India, Brazil, and Russia.

Uses & applications

Extensively used in jewelry making (beads, cabochons), ornamental carvings, stone figurines, and as a popular meditation or 'healing' stone in holistic practices.

Geological facts

Aventurine is named after the Italian 'a ventura' (by chance), referencing the accidental discovery of goldstone glass. The green color is specifically caused by inclusions of chrome-rich Fuchsite mica.

Field identification & locations

Identify in the field by its granular quartz texture combined with internal 'glitter'. Often found in riverbeds or near mica schists. Collectors should look for even color distribution and strong sparkle.

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