gemstone

Orange tumbled stone, likely carnelian

Carnelian, an orange variety of chalcedony (microcrystalline SiO₂)

AI-generated identification · may be incorrect

Translucent orange with a waxy to vitreous luster; Mohs hardness 6.5–7, trigonal microcrystalline quartz, with no visible cleavage. The image alone cannot confirm the identification; dyed or other orange stones can look similar.

Identified September 30, 2026More gemstone →

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Physical properties

Formation & geological history

Carnelian forms as silica fills cavities and veins, often in volcanic rocks; its color commonly comes from iron oxides. It occurs in deposits of many geological ages.

Uses & applications

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

Geological facts

Tumbling smooths the surface and enhances its luster but does not establish the stone’s identity.

Field identification & locations

Look for translucency at the edges, a waxy luster, and hardness sufficient to resist scratching by a steel blade. Carnelian is found in India, Brazil, Uruguay, and parts of the United States; reliable identification may require testing.