mineral

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly containing iron-oxide impurities

AI-generated identification · may be incorrect

Likely Mohs hardness 6.5–7; opaque brown, reddish-orange, and dark gray mottling with a polished, glassy-to-waxy luster. Quartz has a trigonal crystal structure, but jasper is too fine-grained for individual crystals or cleavage to be visible.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms as silica-rich material fills cavities or replaces sediment, with iron oxides creating its colors; deposits range from ancient to geologically recent. The image does not reveal its specific source or age.

Uses & applications

Polished jasper is used for jewelry, beads, ornaments, and lapidary collecting; jasper varieties are generally not major construction materials.

Geological facts

Jasper’s patterns and colors vary widely, and the name covers many decorative varieties rather than one sharply defined appearance.

Field identification & locations

The small, opaque, patterned, polished pebble is consistent with jasper, but visual identification alone cannot distinguish it reliably from other brown chalcedony or similar stones. Jasper occurs worldwide; a basic tumbled pebble typically sells for about $1–$10, with unusually patterned pieces potentially higher.