mineral
Tumbled green aventurine (likely)
Quartz variety, SiO₂, colored by fuchsite or other chromium-bearing mica
AI-generated identification · may be incorrectSmall rounded, polished pebble with pale green color and subdued vitreous-to-waxy luster; quartz hardness is about 7 Mohs, with no obvious cleavage and granular/microcrystalline structure. The image lacks enough detail to confirm characteristic aventurescence (sparkling mica inclusions).
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Physical properties
Small rounded, polished pebble with pale green color and subdued vitreous-to-waxy luster; quartz hardness is about 7 Mohs, with no obvious cleavage and granular/microcrystalline structure. The image lacks enough detail to confirm characteristic aventurescence (sparkling mica inclusions).
Formation & geological history
Forms when silica-rich fluids crystallize quartz with dispersed green mica inclusions, commonly in metamorphic or hydrothermal settings; specimens may be geologically ancient, often Precambrian, depending on source.
Uses & applications
Used for inexpensive cabochons, beads, carvings, tumbled stones, and decorative objects; generally modest collector value.
Geological facts
Green aventurine is commonly confused with dyed quartzite, green chalcedony, jade, or glass. Strong glitter under directional light supports aventurine, while bubbles or uniform color may indicate glass.
Field identification & locations
Common sources include India, Brazil, Russia, and Tanzania. Check for natural granular texture, hardness sufficient to scratch glass, and mica sparkle; definitive identification may require microscopy or chemical testing.
