mineral
Green tumbled stone, possibly aventurine
Unidentified green quartz-rich material; aventurine is a variety of quartz (SiO₂)
AI-generated identification · may be incorrectRounded, polished, opaque-to-translucent green piece with a vitreous sheen. If aventurine, hardness is about 6.5–7 Mohs and its crystal structure is trigonal; the photo is insufficient to confirm composition or cleavage.
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Physical properties
Rounded, polished, opaque-to-translucent green piece with a vitreous sheen. If aventurine, hardness is about 6.5–7 Mohs and its crystal structure is trigonal; the photo is insufficient to confirm composition or cleavage.
Formation & geological history
Aventurine forms when quartz crystallizes with fine mineral inclusions, commonly fuchsite mica; its geological age and source cannot be determined from the image.
Uses & applications
Small tumbled stones are used in jewelry, crafts, and collections; quartz is also widely used in glass and electronics.
Geological facts
Green aventurine’s characteristic sparkle comes from reflective inclusions, often mica.
Field identification & locations
Confirm with close inspection for glittering inclusions and hardness testing; green jade, serpentine, and dyed stones can look similar. Aventurine occurs in regions including India, Brazil, and Russia.
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