mineral

Tumbled green aventurine (probable)

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

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; pale to medium green, translucent to opaque, vitreous-to-waxy luster, granular microcrystalline structure, and no obvious cleavage. The rounded, glossy surface indicates tumbling and polishing; dark spots are likely inclusions or pits.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Forms when quartz-rich rock recrystallizes and incorporates chromium-bearing fuchsite or other green minerals, commonly in metamorphic environments. The specimen’s exact geological age and locality cannot be determined from the image.

Uses & applications

Used for cabochons, beads, carvings, ornamental stone, and inexpensive jewelry; also sold as a lapidary and metaphysical material.

Geological facts

Aventurine’s characteristic aventurescence is caused by reflective mineral flakes, though this piece shows little obvious glitter. Similar green stones may instead be serpentine, jade, or dyed quartzite.

Field identification & locations

Common sources include India, Brazil, Russia, and Tanzania. Confirm with a hardness test, specific gravity, and magnification; jade-like appearance alone is not diagnostic.