Anderson will share some of his stories at the Gem, Mineral & Fossil Show – put on by the Black Hawk Gem & Mineral Society – at the Waterloo Center for the Arts, 225 Commercial St., on Sunday. The ...

On the inside, however, the thunderegg can be filled with intricately laced formations consisting of agate, jasper ... aren't technically rocks, but geodes. Geodes typically have a hollow or ...

When the valley receives generous rainfall, treasures, such as geodes and fossils of dimetrodon footprints ... Find jasper, moqui balls and agates by surface collecting. Dobell Ranch: A private ranch ...