mineral

Brown jasper pebble

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

AI-generated identification · may be incorrect

Smooth, rounded, opaque brown pebble with a waxy-to-dull luster; quartz hardness about 6.5–7 Mohs, trigonal crystal structure at microscopic scale, and no visible cleavage. The image does not establish whether it is naturally rounded or polished.

Identified October 16, 2026More mineral →

Explore Brown jasper pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Silica-rich fluids filled cavities or replaced rock, with iron impurities producing the brown color; jasper deposits form in many geological settings and span a wide range of ages.

Uses & applications

Used for beads, cabochons, ornaments, and small carvings; also collected as a decorative pebble.

Geological facts

Jasper is a chalcedony variety, and its colors and patterns reflect trace impurities and inclusions.

Field identification & locations

Look for an opaque, compact, fine-grained surface and high hardness; jasper occurs worldwide, including in volcanic and sedimentary settings. A scratch test or close inspection would help confirm identification.