mineral

Green aventurine (likely)

Quartzite composed mainly of quartz (SiO₂), colored by fuchsite or other chromium-bearing mica

AI-generated identification · may be incorrect

A polished/tumbled green sphere with vitreous to waxy luster; quartz hardness about 7 Mohs, typically pale to medium green, massive and granular, with no obvious cleavage. The image lacks enough detail to confirm identity; jade, serpentine, or dyed stone are alternatives.

Identified September 21, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms when quartz-rich sandstone is metamorphosed into quartzite, with green mica inclusions producing the color; commonly Precambrian to younger metamorphic material. Commercial material is especially associated with India, Brazil, Russia, and Tanzania.

Uses & applications

Used for beads, carvings, spheres, ornamental objects, and inexpensive jewelry; it is not generally used as a major construction stone in this form.

Geological facts

Aventurine’s characteristic aventurescence is caused by reflective mica flakes, though this specimen appears relatively uniform and may have little visible sparkle.

Field identification & locations

Check for tiny mica flashes, hardness, and density; quartzite should resist scratching by steel, whereas serpentine and dyed softer stones may not. Common rough sources include India and Brazil.