mineral

Red jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

AI-generated identification · may be incorrect

Opaque brick-red to reddish-brown with pale veining and a dull to waxy luster; quartz has Mohs hardness 7 and a trigonal crystal structure, but jasper shows no visible crystals or cleavage. The rounded shape and surface suggest a naturally worn pebble, though the photo alone cannot confirm the identification.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids or sediments become cemented and stained by iron oxides; it occurs in rocks of many geological ages, commonly in volcanic and sedimentary settings.

Uses & applications

Used for beads, cabochons, carvings, and decorative objects; it has little industrial value compared with ordinary quartz.

Geological facts

Jasper is valued for its opaque colors and patterns; its name covers a broad range of iron-rich, microcrystalline quartz materials.

Field identification & locations

Look for opacity, hardness near 7, and a fine-grained texture; it does not scratch easily with a steel knife. Jasper occurs worldwide, including India, Australia, Brazil, and the western United States.