gemstone

Likely tumbled orange carnelian

Carnelian, orange chalcedony (microcrystalline quartz, SiO₂)

AI-generated identification · may be incorrect

Smooth, opaque orange-red surface with a waxy to vitreous luster; quartz hardness 6.5–7, trigonal crystal system at the microscopic level, and no cleavage. The photo alone cannot confirm the stone; dyed agate or another orange mineral is possible.

Identified October 5, 2026More gemstone →

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Physical properties

Formation & geological history

Forms as iron-colored silica deposited in cavities and veins, commonly in volcanic rocks; chalcedony deposits occur across many geological ages. This appears to be a polished/tumbled piece.

Uses & applications

Used for beads, jewelry, ornaments, and collecting; chalcedony is also used for decorative carvings.

Geological facts

Carnelian’s orange color is generally associated with iron impurities; historical use in seals and jewelry dates back thousands of years.

Field identification & locations

Look for a uniformly fine-grained, waxy surface and, in translucent pieces, warm orange color with subtle banding; common sources include India, Brazil, and Uruguay. A hardness or streak test can help distinguish it, but avoid damaging a polished specimen.