gemstone

Tumbled orange-brown stone, likely carnelian or jasper

Chalcedony (microcrystalline quartz, SiO₂), possibly iron-rich jasper

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; orange to brown, opaque to slightly translucent, with a smooth tumbled surface and waxy to vitreous luster. Quartz has a trigonal crystal structure, but microscopic fibers obscure visible crystals; cleavage is absent and fracture is conchoidal.

Identified September 10, 2026More gemstone →

Explore Tumbled orange-brown stone, likely carnelian or jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms when silica-rich fluids fill cavities or fractures, with iron oxides producing the orange-brown color; chalcedony deposits range from Paleozoic to recent, while jasper commonly forms in volcanic or sedimentary settings.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and inexpensive collector specimens; not generally used as a construction stone.

Geological facts

Carnelian is the translucent red-orange variety of chalcedony; more opaque material is often sold as red or orange jasper. Heating or dyeing may intensify color in commercial stones.

Field identification & locations

Common sources include Brazil, India, Madagascar, Uruguay, and the western United States. Identify by its uniform color, very high hardness, lack of cleavage, glass-scratching ability, and conchoidal fracture; the image alone cannot confirm carnelian versus jasper.