mineral

Tumbled green aventurine

Quartz, SiO₂, with fuchsite or other mica inclusions

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; translucent green, vitreous to waxy luster, cryptocrystalline quartz structure, with no visible cleavage and conchoidal fracture. The smooth rounded shape indicates tumbling; faint inclusions are visible rather than strong aventurescence.

Identified September 20, 2026More mineral →

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Physical properties

Formation & geological history

Quartz formed in silica-rich veins or metamorphic rocks, with green chromium-bearing mica inclusions producing the color; the geological age depends on its source deposit. It was subsequently cut and mechanically polished.

Uses & applications

Commonly sold as an inexpensive lapidary stone for cabochons, beads, carvings, and healing/collecting specimens; not generally used in construction.

Geological facts

Aventurine is named for its glittering aventurescence, though this specimen appears relatively subdued. Similar green stones include jade, serpentine, chrysoprase, and dyed quartz.

Field identification & locations

Identify it by its green translucent quartz appearance, hardness, and occasional mica sparkle; glass is usually more uniform and may show bubbles. Common sources include India, Brazil, Russia, and Tanzania.