gemstone

Red-orange tumbled stone, possibly carnelian

Likely carnelian, a variety of chalcedony (microcrystalline SiO₂); identification is uncertain from the image

AI-generated identification · may be incorrect

Glossy, rounded and translucent orange-red with darker inclusions or surface reflections. If carnelian, hardness is about 6.5–7 Mohs, luster is waxy to vitreous, and crystals are too fine to see; no cleavage.

Identified October 3, 2026More gemstone →

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Physical properties

Formation & geological history

Carnelian forms when silica-rich fluids deposit chalcedony, commonly filling cavities in volcanic rocks; deposits occur in many ages and regions. The visible polish indicates human tumbling or shaping.

Uses & applications

Used for beads, pendants, and other ornamental objects; also collected as a common decorative stone.

Geological facts

Carnelian’s warm color is typically caused by iron oxides, and heat treatment can deepen or alter its color.

Field identification & locations

A translucent orange-red body and waxy polish are consistent with carnelian, but the photo alone cannot distinguish it reliably from colored glass or another tumbled material. Common sources include India, Brazil, and Uruguay.