mineral
Tumbled amber-colored mineral or glassy pebble
Uncertain; likely chalcedony/quartz, possibly resinous amber or slag glass
AI-generated identification · may be incorrectSmall rounded, translucent yellow-orange specimen with a waxy to vitreous luster and conchoidal-looking surface. If quartz/chalcedony, hardness is about 6.5–7 Mohs; amber is much softer (2–2.5), while glass is about 5–6.
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Physical properties
Small rounded, translucent yellow-orange specimen with a waxy to vitreous luster and conchoidal-looking surface. If quartz/chalcedony, hardness is about 6.5–7 Mohs; amber is much softer (2–2.5), while glass is about 5–6.
Formation & geological history
The image alone cannot establish origin or geological age. Chalcedony forms from silica-rich fluids in cavities and volcanic or sedimentary rocks; amber is fossilized tree resin, commonly Cretaceous to Cenozoic in age.
Uses & applications
Chalcedony is used for cabochons, beads, carvings, and lapidary material; amber is used in jewelry and ornaments. Common glassy pebbles have little commercial value.
Geological facts
Its unusually smooth, rounded shape suggests natural abrasion or tumbling. A hardness, density, and UV/black-light test would help distinguish chalcedony, amber, and glass.
Field identification & locations
Common possibilities occur in stream gravels, beaches, deserts, and lapidary collections worldwide. Quartz will scratch glass; amber may float in concentrated salt water and feels very light; glass often shows bubbles or flow lines.
