sedimentary

Tumbled reddish-brown pebble

Indeterminate lithic fragment; possibly iron-stained quartzite, chert, or jasper

AI-generated identification · may be incorrect

Smooth, rounded, matte-to-subdued luster, reddish-brown color, and fine-grained appearance. Likely hardness about 6–7 Mohs if quartz-rich; cleavage is not visible, and specific gravity is approximately 2.5–2.7.

Identified August 23, 2026More sedimentary →

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Physical properties

Formation & geological history

Most likely a naturally water-rounded or mechanically tumbled fragment of silica-rich rock, with iron oxides producing the red-brown color; its geological age and original source cannot be determined from the image.

Uses & applications

Suitable as a decorative pebble, craft material, or teaching specimen; it has little jewelry or commercial value unless confirmed as attractive jasper or another collectible variety.

Geological facts

The uniform oval shape and smooth surface suggest tumbling or prolonged abrasion. A streak, hardness, translucency, and close inspection of texture would distinguish jasper, chert, quartzite, and iron-rich sandstone.

Field identification & locations

Commonly found in stream gravels, beaches, landscaping stone, and rock-tumbling collections. Test whether it scratches glass, inspect for granular quartz texture, and check its streak on unglazed porcelain.