Geodes

The term geode comes from an ancient Greek word meaning “earthlike”. Geodes are unique, mostly round rocks, that are found in in igneous and sedimentary rocks. They are hollow with mineral, often crystallized, on the inside. When the rock around the hollow hardens, a steady feed of dissolved silicates or carbonates accumulates on the inside of the hollow, often leading to the formation of silicate or carbonate based crystals in the hollow. Crystals that might form in a geode might include clear quartz, iron stained quartz, agate, amethyst, jasper, or chalcedony. calcite, dolomite or celestite. In the United States, geodes are common in parts of Indiana, Iowa, Missouri, western Illinois, Kentucky, and Utah.

We offer a variety of these beautiful geo rocks for sale.