mineral

Red jasper pebbles

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

AI-generated identification · may be incorrect

Typically Mohs 6.5–7; opaque brick-red to reddish brown, with a dull to waxy luster and no visible crystal faces. The pebbles appear naturally rounded and slightly smoothed.

Identified October 7, 2026More mineral →

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Physical properties

Typically Mohs 6.5–7; opaque brick-red to reddish brown, with a dull to waxy luster and no visible crystal faces. The pebbles appear naturally rounded and slightly smoothed.

Formation & geological history

Jasper forms when silica-rich fluids or sediments become cemented and iron-bearing impurities color the quartz; it occurs in many geological ages and settings.

Uses & applications

Used for beads, cabochons, carvings, decorative stones, and small collectibles; this material is not commonly used as a construction stone.

Geological facts

Jasper is a variety of chalcedony, itself microcrystalline quartz; red coloration commonly comes from hematite or other iron oxides.

Field identification & locations

Look for opaque red color, fine-grained texture, and hardness sufficient to resist a steel blade. Jasper occurs worldwide, including in the United States, India, Australia, and Brazil.