gemstone
Orange chalcedony (carnelian), possibly amber
Carnelian: microcrystalline quartz, SiO₂; amber: fossilized plant resin
AI-generated identification · may be incorrectTranslucent orange-red, waxy to vitreous luster, no visible cleavage; quartz hardness ~7 and specific gravity ~2.6. The image’s rough, glowing appearance is consistent with carnelian, though amber cannot be ruled out visually.
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Physical properties
Translucent orange-red, waxy to vitreous luster, no visible cleavage; quartz hardness ~7 and specific gravity ~2.6. The image’s rough, glowing appearance is consistent with carnelian, though amber cannot be ruled out visually.
Formation & geological history
Carnelian forms when silica-rich fluids fill cavities in volcanic rocks, commonly during the Cenozoic and older periods; amber formed from fossilized resin, commonly tens of millions of years old. The specimen is likely naturally rough or lightly shaped.
Uses & applications
Used for beads, cabochons, carvings, and ornaments; quality carnelian is a durable jewelry stone. Amber is softer and valued for jewelry, inclusions, and decorative objects.
Geological facts
Carnelian’s orange color commonly comes from iron oxides. Amber is unusually light, can float in salt water, and may show plant or insect inclusions.
Field identification & locations
Check for quartz-like hardness, a cool dense feel, and conchoidal fracture for carnelian; amber is much lighter, warmer-feeling, and may electrostatically attract paper after rubbing. Common sources include India, Brazil, Uruguay, Madagascar, and Indonesia.