mineral
Tumbled green aventurine (likely)
Quartz, SiO₂, with green fuchsite mica inclusions
AI-generated identification · may be incorrectOpaque to translucent pale green with a polished surface and scattered dark inclusions; quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65. The small, smooth pebble’s identity is tentative from appearance alone.
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Physical properties
Opaque to translucent pale green with a polished surface and scattered dark inclusions; quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65. The small, smooth pebble’s identity is tentative from appearance alone.
Formation & geological history
Aventurine forms when quartz crystallizes with reflective mineral inclusions, commonly during metamorphic or hydrothermal processes; its age depends on the deposit.
Uses & applications
Used for beads, carvings, decorative objects, and inexpensive jewelry; polished pieces are popular with collectors.
Geological facts
The glittering effect called aventurescence is caused by platy inclusions, typically mica, reflecting light.
Field identification & locations
Look for green quartz with mica flecks and hardness near 7; common sources include India, Brazil, and Russia. The pictured specimen appears tumbled and may be another green quartz or rock.
