mineral

Polished green aventurine (probable)

Quartz, SiO₂, with green fuchsite or chlorite inclusions

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, translucent to opaque, green, with a vitreous to waxy luster and no obvious cleavage; quartz is trigonal and conchoidally fracturing. The specimen appears polished and triangular, though the image alone cannot confirm composition.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize quartz in metamorphic or hydrothermal environments, incorporating chromium-bearing fuchsite or chlorite; deposits are commonly Precambrian to Paleozoic, depending on locality.

Uses & applications

Used for beads, carvings, cabochons, ornamental objects, and inexpensive collector specimens; sometimes sold as a luck or “heart-healing” stone.

Geological facts

True aventurine commonly shows aventurescence—sparkling reflections from mica inclusions—but this piece appears relatively dark and subdued. Similar green material may instead be serpentine, nephrite, or green jasper.

Field identification & locations

Check for quartz-like hardness: it should scratch ordinary glass but not be scratched by a steel knife; look for glittering mica and conchoidal fracture. Common sources include India, Brazil, Russia, and Zimbabwe.