Concretions

Fairy Stones, Moqui Balls & Pop Rocks

A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. Concretions are often ovoid or spherical in shape, although irregular shapes also occur.

For more information:   Go to Fairy Stones       Go to Moqui/Boji Balls       Go to Pop Rocks