mineral
Green glass cabochon or tumbled stone
Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral
AI-generated identification · may be incorrectSmall, rounded, polished green body with strong vitreous luster and internal reflective streaks; apparent hardness about 5–6 if glass, with no visible crystal faces or cleavage. The image is insufficient to confirm a natural geological material.
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Physical properties
Small, rounded, polished green body with strong vitreous luster and internal reflective streaks; apparent hardness about 5–6 if glass, with no visible crystal faces or cleavage. The image is insufficient to confirm a natural geological material.
Formation & geological history
The smooth domed shape suggests a manufactured cabochon or decorative glass bead; natural green stones such as aventurine quartz or nephrite are alternative possibilities, but cannot be distinguished from this photograph. If aventurine quartz, it formed in silica-rich veins or metamorphic rocks; if glass, it has no geological age.
Uses & applications
Likely used as costume jewelry, a craft cabochon, or decorative object; natural aventurine could be used in carvings and inexpensive jewelry.
Geological facts
Bright internal flashes may indicate aventurine glass or included mica, while the perfectly smooth dome favors human processing. It is resting on fabric, not rock.
Field identification & locations
Check for bubbles, flow lines, uniform color, and a glass-like conchoidal fracture; a loupe, hardness test, and refractive-index test are needed. Natural aventurine usually shows granular quartz and mica sparkle rather than obvious bubbles.
