mineral

Tumbled green aventurine

Quartz (SiO₂), with green color typically from fuchsite mica inclusions

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; green, with a vitreous to slightly waxy polish and fine sparkly inclusions. Trigonal crystal structure; no prominent cleavage, with conchoidal fracture. The photo shows a polished tumbled piece.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich fluids crystallized quartz, commonly with chromium-bearing mica inclusions. Its exact geological age and source cannot be determined from the image.

Uses & applications

Used for beads, cabochons, small carvings, and decorative or collector pieces.

Geological facts

Aventurine is a variety of quartz; its subtle glitter, called aventurescence, comes from reflective mineral inclusions.

Field identification & locations

Look for a uniform green body with tiny reflective flecks and quartz-like hardness; common sources include India, Brazil, and Russia. The pictured stone is consistent with tumbled aventurine, though identification from appearance alone is not definitive.