mineral

Tumbled green aventurine

Quartz (SiO₂), typically colored by fuchsite mica inclusions

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; green, vitreous to softly waxy polish, translucent to opaque, with granular quartz texture and no prominent cleavage. The visible piece is a smooth, polished pebble; its exact identity cannot be confirmed from appearance alone.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

A quartz-rich material formed when silica crystallizes in metamorphic or hydrothermal settings, with green color commonly caused by dispersed chromium-bearing fuchsite. Quartz deposits occur in many ages and geological environments.

Uses & applications

Used for beads, cabochons, carvings, ornamental objects, and inexpensive jewelry; also collected as a decorative stone.

Geological facts

Aventurine’s characteristic shimmer, called aventurescence, comes from reflective mineral inclusions, though it may be subtle or absent in a particular piece.

Field identification & locations

Often sold as tumbled aventurine; check for natural-looking inclusions and consistent green color, since dyed materials and other green stones can look similar. Common sources include India, Brazil, Russia, and parts of Africa.