mineral

Likely jasper pebble

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

AI-generated identification · may be incorrect

Opaque, mottled reddish-brown and yellow-green surface with a dull to slightly waxy luster; quartz hardness about 6.5–7 Mohs, no visible cleavage, and a trigonal crystal structure at the microscopic scale.

Identified October 5, 2026More mineral →

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Physical properties

Formation & geological history

Jasper forms when silica-rich fluids or sediments become microcrystalline quartz, with iron compounds producing its colors. It occurs in many geological ages and settings; the photo alone cannot establish the specimen’s age or exact origin.

Uses & applications

Used for beads, cabochons, ornaments, and small carvings; attractive pieces are collected, while common pebbles have modest value.

Geological facts

Jasper’s color patterns vary widely because of mineral impurities and inclusions.

Field identification & locations

Its opaque, fine-grained appearance and hardness are consistent with jasper, but confirmation requires closer examination; it may also be another iron-stained rock. Jasper occurs worldwide, commonly in silica-rich veins and sedimentary deposits.