gemstone

Tumbled orange carnelian (likely)

Chalcedony, microcrystalline quartz (SiO₂)

AI-generated identification · may be incorrect

Smooth, opaque-to-translucent orange-brown stone with a waxy to vitreous polish; quartz hardness 6.5–7, trigonal crystal structure, no prominent cleavage. The image does not reveal internal texture, so identification is provisional.

Identified September 25, 2026More gemstone →

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Physical properties

Formation & geological history

Carnelian forms when silica-rich fluids deposit chalcedony in cavities and fractures, often in volcanic rocks; iron oxides produce its orange color. Deposits occur in many ages and regions.

Uses & applications

Used for beads, cabochons, pendants, and ornamental objects; also collected as a tumbled stone.

Geological facts

Carnelian is a colored variety of chalcedony, not a separate mineral species; heating can deepen its orange-red color.

Field identification & locations

Look for consistent orange color, translucency at thin edges, and a smooth waxy surface; common sources include India, Brazil, Uruguay, and Madagascar. The polished appearance is consistent with a tumbled specimen.