mineral

Tumbled green aventurine (probable)

Quartz (SiO₂) with fuchsite or other green mica inclusions

AI-generated identification · may be incorrect

Smooth, rounded, opaque to translucent green stone with vitreous-to-waxy luster; quartz hardness about 7 Mohs, no obvious cleavage, specific gravity about 2.6. The image is insufficient to confirm aventurine versus jade, serpentine, or glass.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Typically forms in silica-rich metamorphic or hydrothermal environments, where chromium-bearing mica produces the green color; geological ages vary by deposit. Common sources include India, Brazil, Russia, and Zimbabwe.

Uses & applications

Commonly sold as tumbled stone, cabochons, beads, carvings, and ornamental material; occasionally used for countertops and decorative objects.

Geological facts

Aventurine’s characteristic sparkle, called aventurescence, comes from reflective mica platelets, though this specimen appears only faintly sparkly or non-sparkly.

Field identification & locations

Check for tiny glittering inclusions, hardness, and cool stone-like feel; glass may show bubbles, while jade and serpentine differ in hardness and density. Reliable identification requires a scratch, refractive-index, or specific-gravity test.