mineral
Green aventurine pebble
Quartz (SiO₂) with fuchsite mica inclusions
AI-generated identification · may be incorrectTypically pale to medium green with a waxy-to-glassy luster and subtle sparkle; Mohs hardness 6.5–7, no prominent cleavage, and a trigonal crystal structure. The rounded shape indicates tumbling or natural water abrasion; the small cavity may be a natural vug or surface wear.
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Physical properties
Typically pale to medium green with a waxy-to-glassy luster and subtle sparkle; Mohs hardness 6.5–7, no prominent cleavage, and a trigonal crystal structure. The rounded shape indicates tumbling or natural water abrasion; the small cavity may be a natural vug or surface wear.
Formation & geological history
Aventurine forms when quartz-rich rock crystallizes with disseminated green fuchsite mica, commonly in metamorphic or hydrothermal settings. The specimen is likely a modern tumbled fragment rather than an intact natural crystal; its exact geological age cannot be determined from the image.
Uses & applications
Used for beads, carvings, cabochons, ornaments, and inexpensive polished specimens; occasionally used decoratively as aggregate or facing stone.
Geological facts
Green aventurine’s color is mainly caused by chromium-bearing fuchsite, while aventurescence comes from reflective mica flakes. It is commonly confused with dyed quartz or green glass.
Field identification & locations
Identify it by its hardness, cool quartz feel, translucent green body, and mica-like glitter under strong light; glass is usually softer or shows bubbles. Common sources include India, Brazil, Russia, and Tanzania.
