mineral

Polished green aventurine (probable)

Quartzite dominated by quartz (SiO₂), with green mica/fuchsite inclusions

AI-generated identification · may be incorrect

Green, rounded and polished, with a glassy to waxy luster and reflective mica-like flashes. Quartz hardness is about 7 Mohs; massive, with no obvious cleavage and specific gravity near 2.6–2.7.

Identified August 29, 2026More mineral →

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Physical properties

Green, rounded and polished, with a glassy to waxy luster and reflective mica-like flashes. Quartz hardness is about 7 Mohs; massive, with no obvious cleavage and specific gravity near 2.6–2.7.

Formation & geological history

Aventurine forms when quartz-rich rock recrystallizes and becomes impregnated with green fuchsite or other inclusions, typically during metamorphism. Individual pieces generally cannot be assigned a precise geological age from appearance alone.

Uses & applications

Commonly used for beads, cabochons, carvings, worry stones, and ornamental objects; occasionally used as decorative stone or countertop material.

Geological facts

The sparkle, called aventurescence, comes from light reflecting off aligned platy inclusions. Similar-looking green glass or serpentine can be distinguished with hardness, texture, and inclusions.

Field identification & locations

Likely sources include India, Brazil, Russia, Tanzania, and China. Check for natural granular texture and mica glints; a quartz scratch test should not be attempted on valuable material, and visual identification is only provisional.