mineral

Tumbled green aventurine (probable)

Quartz aggregate, SiO₂, colored by fuchsite or other green inclusions

AI-generated identification · may be incorrect

Smooth, rounded, opaque to slightly translucent green pebble with a vitreous-to-waxy luster; quartz hardness is about 7 Mohs, with no obvious cleavage and specific gravity near 2.65. The image is insufficient to confirm mineral identity; it could also be serpentine, jade, or dyed stone.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Aventurine forms when silica-rich fluids or melts crystallize quartz containing mica inclusions, commonly in metamorphic or hydrothermal settings; most commercial material comes from India, Brazil, Russia, and Tanzania. Geological ages vary by deposit.

Uses & applications

Used for inexpensive cabochons, beads, carvings, tumbled stones, ornaments, and decorative aggregate; it is popular in crystal collecting.

Geological facts

Green color and subtle glitter (“aventurescence”) usually indicate fuchsite mica, though no glitter is clearly visible here. A glassy scratch resistance and quartz-like density help distinguish it from softer green stones.

Field identification & locations

Check for tiny reflective mica flakes, hardness against steel or glass, consistent color, and absence of fibrous texture; definitive identification requires specific-gravity, microscopic, or laboratory testing. Commonly found in polished-stone shops rather than as an identifiable field specimen.