mineral

Polished red jasper or carnelian

Microcrystalline quartz (SiO₂), likely chalcedony/jasper colored by iron oxides

AI-generated identification · may be incorrect

Opaque to slightly translucent reddish-brown material with resinous to waxy polish and no visible crystal faces. Quartz hardness is about Mohs 7; specific gravity is roughly 2.6, with conchoidal fracture and indistinct cleavage.

Identified September 21, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities or replaces volcanic and sedimentary host rock; iron oxides create the red color. The specimen is likely tumbled or cabochon-polished, so its precise geological age cannot be determined from the image.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and lapidary collections; jasper is also used decoratively in tiles and small architectural objects.

Geological facts

The opaque appearance favors jasper, while the more translucent red edges could indicate carnelian or brecciated chalcedony. Color commonly results from hematite or goethite inclusions.

Field identification & locations

Identify it by its red iron-stained color, glassy or waxy polish, hardness, and lack of cleavage; it should resist scratching from a steel knife. Common sources include India, Madagascar, Brazil, Uruguay, Namibia, and the western United States.