mineral

Moqui Marry / Shaman Stone

Hematite-cemented Sandstone Concretion

Hardness: 5-7.5 (depending on the iron shell), Color: Dark brown to blackish grey, Luster: Metallic to dull, Crystal structure: Amorphous/concretionary, Cleavage: None, Specific Gravity: approx 3.8-4.5

Hardness: 5-7

Identified August 6, 2026More mineral →

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Physical properties

Formation & geological history

Formed in Navajo Sandstone formations in Utah, USA, through the precipitation of iron-rich groundwaters cementing quartz grains into spherical or discoidal concretions over millions of years.

Uses & applications

Used by collectors, in meditation, and as metaphysical energy stones (Shaman stones).

Geological facts

Also known as 'Thunderballs', these concretions often form in distinctive spherical or saucer-like shapes resembling marbles or buttons scattered across desert floors.

Field identification & locations

Found predominantly in southern Utah. Look for spherical or discoidal brown rock nodules with a hard iron oxide outer shell weathered out of sandstone cliffs.

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