gemstone

Red jasper (likely tumbled)

Microcrystalline quartz, chiefly SiO₂, colored red by iron oxides

AI-generated identification · may be incorrect

Opaque reddish-brown, smooth and subtly waxy to vitreous; Mohs hardness 6.5–7; trigonal quartz structure, with no visible cleavage and conchoidal fracture when broken. The image does not reveal internal texture or confirm the identification.

Identified September 25, 2026More gemstone →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids or sediments become cemented or deposited, with iron oxides providing color; such deposits occur in rocks of many geological ages.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and small decorative objects.

Geological facts

Jasper is an opaque variety of chalcedony, a form of microcrystalline quartz; its color and patterns vary with mineral impurities.

Field identification & locations

The even red-brown color and opaque, polished appearance fit red jasper, but other red stones can look similar; hardness and surface tests or professional examination can help distinguish them. Found in many regions worldwide, including India, Brazil, and the United States.