gemstone

Possible tumbled carnelian (red-orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); identification is tentative from the small image

AI-generated identification · may be incorrect

Small, rounded, partly translucent piece with reddish-brown and whitish areas and a waxy to vitreous luster. Quartz has Mohs hardness 7, trigonal crystal structure at the microscopic level, no cleavage, and specific gravity near 2.6; these properties cannot be confirmed visually.

Identified October 15, 2026More gemstone →

Explore Possible tumbled carnelian (red-orange chalcedony) in the encyclopedia →

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Physical properties

Formation & geological history

If chalcedony, it formed as silica deposited in cavities or fractures, commonly in volcanic rocks; it may have been naturally rounded or tumbled. Its age cannot be determined from the photo.

Uses & applications

Carnelian is used for beads, cabochons, small carvings, and ornamental objects; this piece appears too small for most uses.

Geological facts

Carnelian is the orange-red variety of chalcedony, with color commonly caused by iron impurities.

Field identification & locations

The smooth shape and mottled translucence are consistent with a tumbled stone, but the image is insufficient to rule out resin or another material. The reported German location is not diagnostic; chalcedony can occur in transported gravel, but a local origin cannot be established.