gemstone

Polished orange-red stone, likely carnelian

Carnelian, a translucent variety of chalcedony (microcrystalline quartz, SiO₂)

AI-generated identification · may be incorrect

Typically Mohs 6.5–7; orange to reddish brown with a waxy to vitreous luster and no visible crystal faces. The rounded, polished specimen shows pale bands or a rind; its exact identity cannot be confirmed from the image alone.

Identified October 11, 2026More gemstone →

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Physical properties

Formation & geological history

Forms as silica-rich chalcedony in cavities and veins, often colored by iron oxides. It occurs in volcanic and sedimentary settings; its formation age depends on the host deposit.

Uses & applications

Used for beads, cabochons, carvings, and decorative objects; polished pieces are popular with collectors.

Geological facts

Carnelian has been used for seals, jewelry, and ornamental carving since antiquity.

Field identification & locations

Look for translucent orange-red color, waxy luster, and hardness near 7; common sources include India, Brazil, Uruguay, and Madagascar. The pictured piece appears shaped and polished.