how to identify thundereggs

Common geodes that are popular have hollow centers and usually filled with dazzling crystals while thunder eggs are typically full of agate. Mt Hay Thundereggs are quite amazing stones created by volcanic action, where gasses containing minerals were part of a volcanic lava flow. Thundereggs may appear like ordinary rocks to the untrained eye. Though thundereggs appear as rocks, they can be easily identifiable by the abnormally round and bumpy brown-gray exteriors. Where to Look for Geodes. Though geodes may look like ordinary rocks, they conceal a hollowed interior that is chock full of different colored minerals and rocks such as amethyst, quartz, agate, and jade. DISCLAIMER: This website or the contributor have made great efforts to provide accurate, complete and detailed information. A beautiful and rare geodized fossil snail filled with yellow calcite crystals – Image credit to James St. John – CC-BY-2.0. Though geodes may look like ordinary rocks, they conceal a hollowed interior that is chock full of different colored minerals and rocks such as amethyst, quartz, agate, and jade.