gemstone

Likely tumbled orange carnelian

Carnelian, orange chalcedony (microcrystalline quartz, SiO₂)

AI-generated identification · may be incorrect

Smooth, opaque-to-translucent orange stone with a waxy to vitreous luster; quartz crystal structure is microscopic, Mohs hardness 6.5–7, specific gravity about 2.6. The image alone cannot confirm the identification; other orange stones may look similar.

Identified October 8, 2026More gemstone →

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Physical properties

Formation & geological history

Carnelian forms as iron-colored chalcedony in cavities and veins, often in volcanic rocks; its geological age varies by deposit. Tumbling and polishing create the rounded finish shown.

Uses & applications

Used for beads, cabochons, carvings, and decorative objects; historically valued as an ornamental stone.

Geological facts

Carnelian is a variety of chalcedony, itself a microcrystalline form of quartz, rather than a separate mineral species.

Field identification & locations

Look for a smooth surface, orange-red color, and translucence at thin edges; common sources include India, Brazil, and Uruguay. A scratch or hardness test can damage a finished piece, so use non-destructive inspection first.