mineral
Tumbled green aventurine
Quartz (SiO₂), commonly with fuchsite inclusions
AI-generated identification · may be incorrectHardness 6.5–7 Mohs; green, with a polished vitreous luster and typically massive, granular quartz structure. The image shows a smooth, opaque-to-translucent green pebble with pale inclusions.
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Physical properties
Hardness 6.5–7 Mohs; green, with a polished vitreous luster and typically massive, granular quartz structure. The image shows a smooth, opaque-to-translucent green pebble with pale inclusions.
Formation & geological history
A quartz variety formed when silica-rich fluids crystallize in metamorphic rocks, often with chromium-bearing mica inclusions. Its geological age varies by deposit; tumbling is a modern finishing process.
Uses & applications
Used for beads, cabochons, carvings, decorative objects, and inexpensive jewelry.
Geological facts
Aventurine’s subtle sparkle, called aventurescence, comes from reflective mineral inclusions; not all green aventurine displays it strongly.
Field identification & locations
Common sources include India, Brazil, Russia, and Tanzania. Identify it by its green color, quartz-like hardness, and occasional mica shimmer; the photograph alone cannot confirm the specific mineral inclusions.
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