mineral

Tumbled Stone

Silicon dioxide / Various silicates

Hardness varies from 6 to 7 on the Mohs scale depending on composition, vitreous to waxy luster, smooth tumbled texture, amorphous or cryptocrystalline structure

Identified July 30, 2026More mineral →

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Physical properties

Hardness varies from 6 to 7 on the Mohs scale depending on composition, vitreous to waxy luster, smooth tumbled texture, amorphous or cryptocrystalline structure

Formation & geological history

Formed through natural geological processes over millions of years and subsequently shaped and polished by tumbling machines using abrasives.

Uses & applications

Used primarily in lapidary arts, jewelry making, meditation, and as decorative collector specimens.

Geological facts

Tumbling stones is a modern technique that mimics the natural smoothing action of river currents and ocean waves over centuries.

Field identification & locations

Commonly found in rock shops and lapidary collections worldwide. Identification requires specific tests like hardness and streak depending on the base mineral.