sedimentary

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Hematite/Goethite-encased Sandstone)

AI-generated identification · may be incorrect

Hardness: 5-6 (outer shell), color: brown to reddish-black outer with tan interior, luster: dull to metallic, structure: spherical/concretionary, cleavage: none, specific gravity: 3.4-4.2

Identified March 30, 2026More sedimentary →

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Physical properties

Hardness: 5-6 (outer shell), color: brown to reddish-black outer with tan interior, luster: dull to metallic, structure: spherical/concretionary, cleavage: none, specific gravity: 3.4-4.2

Formation & geological history

Formed roughly 25 million years ago via groundwater precipitation of iron oxide minerals around a nucleus (like a sand grain) within the Navajo Sandstone of the American Southwest.

Uses & applications

Primarily used as metaphysical 'healing stones', geological curiosities, and educational specimens; historically used by Native Americans for games and spiritual rituals.

Geological facts

Also known as 'Moqui Balls', these concretions were protected by the Hopi legend of ancestors playing games with them. They are found in the Jurassic-aged Navajo Sandstone in Utah.

Field identification & locations

Identify by its distinct round or disc shape and dark, hard iron-rich shell. Most commonly found in the Grand Staircase-Escalante National Monument/Southern Utah. Collectors look for perfect symmetry.