mineral

Green quartz pebble, possibly aventurine

Quartz (SiO₂), likely fuchsite-bearing aventurine quartz

AI-generated identification · may be incorrect

Hardness 7; pale green, translucent to opaque, with a dull-to-glassy luster and irregular granular texture. Quartz is trigonal and lacks cleavage, breaking conchoidally; the green color commonly comes from fuchsite mica or chlorite inclusions.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids and igneous veins; aventurine forms when mica or chlorite becomes included during growth. The specimen is likely a naturally weathered or tumbled fragment, with age dependent on its parent rock.

Uses & applications

Used as decorative stone, carvings, beads, and inexpensive jewelry; small rough pieces have limited commercial value.

Geological facts

Aventurine’s characteristic green color is caused by microscopic inclusions rather than green quartz itself. True aventurine often shows subtle glitter, called aventurescence, when rotated in light.

Field identification & locations

Identify by its glassy fracture, lack of cleavage, and inability to scratch with a steel knife; it should scratch ordinary glass. Common sources include India, Brazil, Russia, Tanzania, and China; visual identification from this photo is not definitive.