mineral

Green aventurine (likely)

Quartz aggregate with fuchsite mica; SiO₂

AI-generated identification · may be incorrect

A small tumbled, pale-green, translucent-to-opaque stone with a vitreous-to-waxy luster and likely subtle aventurescence. Quartz hardness is about Mohs 7; no obvious cleavage, conchoidal fracture, and specific gravity near 2.65.

Identified September 1, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz veins or silica-rich rocks crystallize with green fuchsite mica or other inclusions, commonly in metamorphic environments. Most commercial material comes from India, Brazil, Russia, and Tanzania; exact age depends on locality.

Uses & applications

Used for inexpensive cabochons, beads, carvings, polished stones, and decorative objects; it is also popular in crystal collecting. This rounded specimen has modest commercial value.

Geological facts

Aventurine’s characteristic glitter results from light reflecting from platy mineral inclusions; this effect is called aventurescence. Green color is commonly caused by fuchsite, though some stones sold as aventurine are quartzite or dyed material.

Field identification & locations

Identify it by its quartz-like hardness, cool glassy surface, green body color, and occasional sparkles under bright light; it should scratch ordinary glass but not be scratched by steel. The photograph cannot exclude green glass, jade, or dyed quartz without testing.