mineral

Green aventurine quartz (tentative)

Quartz, SiO₂, with green fuchsite mica or other inclusions

AI-generated identification · may be incorrect

Typically translucent to opaque pale green with a vitreous luster and subtle sparkle; Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The pictured fragment is too small and blurred for confident mineral confirmation.

Identified August 12, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize quartz and incorporate chromium-bearing fuchsite mica, commonly in metamorphic rocks; deposits are generally Precambrian to younger. Common sources include India, Brazil, Russia, and Tanzania.

Uses & applications

Used for beads, carvings, cabochons, and ornamental stone; ordinary fragments have little commercial value.

Geological facts

Aventurine’s characteristic aventurescence is caused by reflective mica or hematite inclusions. Green color may also result from chlorite, so visual identification alone is unreliable.

Field identification & locations

Look for a glassy surface, hardness sufficient to scratch ordinary glass, and glittering inclusions; test streak, hardness, and specific gravity, or use microscopy/Raman analysis. Commonly found as rounded tumbled pieces or veins in metamorphic host rocks.