mineral

Tumbled green aventurine (probable)

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

AI-generated identification · may be incorrect

Opaque to translucent olive-green, smoothly tumbled, with a vitreous-to-waxy luster; quartz hardness about 7 Mohs, massive granular texture, and no obvious cleavage. The image is slightly blurred, so exact identification is uncertain.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Aventurine forms when quartz-rich rock recrystallizes and incorporates green mica or chlorite; the source material is commonly Proterozoic to younger metamorphic quartzite. Green varieties are especially associated with India, Brazil, Russia, and Tanzania.

Uses & applications

Used for beads, cabochons, carvings, décor, and inexpensive gemstone jewelry; tumbled pieces commonly sell as curios or metaphysical stones.

Geological facts

The green color and occasional subtle shimmer result from included fuchsite, not green quartz. It is often confused with jade, serpentine, or dyed glass.

Field identification & locations

Check for a granular quartz texture, lack of fibrous or waxy appearance, and hardness sufficient to scratch ordinary glass; a refractive index or microscopic examination confirms it. Common rough and tumbled material is widely sold worldwide.