gemstone

Carnelian ring

Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)

AI-generated identification · may be incorrect

The polished cabochon is reddish brown with a waxy-to-glassy luster; quartz has Mohs hardness 7 and a trigonal crystal structure, though its microscopic crystals are not visible. The setting appears to be silver-colored metal.

Identified September 25, 2026More gemstone →

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Physical properties

Formation & geological history

Carnelian forms as iron-colored chalcedony in cavities and veins of volcanic rocks, and in some sedimentary deposits. Its geological age varies by deposit; the image cannot establish its source or age.

Uses & applications

Used for jewelry, beads, seals, and ornamental carving; this specimen is set as a ring.

Geological facts

Carnelian is colored by iron impurities, and heating can deepen or alter its red-orange color.

Field identification & locations

Identify it by its smooth, translucent-to-opaque reddish chalcedony appearance and hardness; common sources include India, Brazil, and Uruguay. A photo alone cannot confirm the stone or metal setting.