mineral

Tumbled yellow-brown stone, likely jasper or quartzite

Undetermined; possibly microcrystalline quartz (SiO₂) in jasper or quartzite

AI-generated identification · may be incorrect

Small polished/tumbled pebble with opaque tan-yellow color and subdued waxy-to-glassy luster; likely Mohs hardness 6.5–7, with no visible cleavage. Exact identification requires hardness, streak, and magnification tests.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

If jasper, it formed from silica-rich sediment or volcanic fluids later cemented and stained by iron oxides; if quartzite, it is metamorphosed quartz sandstone. Formation ages vary widely by locality.

Uses & applications

Typically sold as a low-cost tumbled stone for collecting, crafts, décor, and jewelry; not generally used as an architectural stone at this size.

Geological facts

The yellow-brown coloration commonly results from limonite or hematite inclusions. Polishing can make several unrelated rocks appear similar.

Field identification & locations

Commonly found in gravel deposits, riverbeds, and commercial tumbling mixes; it may be identified by lack of fizz in acid, a white streak, and resistance to scratching by a steel blade. A photo cannot distinguish jasper from quartzite confidently.