Geodes are hallow volcanic cavities with crystals growing inside. This particular geode has been plated to give it a silver finish, and to make the crystal druze sparkle. Geodes are great for physical strength, a shield against evil visions and a good luck charm.
This stone requires special care - exposure to water and other chemicals, such as cleaning products or aerosols, will damage it over time. If you polish the stone, use a dry cloth only, or an air duster that does not contain any disinfectant or other chemicals.