mineral

Brown jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-oxide stained

AI-generated identification · may be incorrect

Opaque, brown with reddish-orange areas and a waxy to dull luster; Mohs hardness about 6.5–7. Massive, with no visible crystal faces or cleavage; specific gravity about 2.6.

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

Opaque, brown with reddish-orange areas and a waxy to dull luster; Mohs hardness about 6.5–7. Massive, with no visible crystal faces or cleavage; specific gravity about 2.6.

Formation & geological history

Jasper forms when silica-rich fluids fill or replace rock, with iron oxides providing the color. It occurs in rocks of many ages and settings; the image cannot establish its exact origin or age.

Uses & applications

Often cut and polished for cabochons, beads, and ornaments; also collected as a decorative pebble.

Geological facts

Jasper is an opaque variety of chalcedony, itself a microcrystalline form of quartz.

Field identification & locations

The smooth, opaque surface and hardness are consistent with jasper, but visual identification alone is uncertain. Common worldwide in silica-rich deposits; this small pebble would typically sell for about $1–$10.