Purchase Silver Druzy Agate Beads line online at low price. Druzy is a highly sought-after precious substance which is popular for use in jewelry. Druzy gets its name from the word ?druse,? which refers to a rock surface (usually a cavity) covered with tiny crystals, such as are found inside geodes or in larger pockets of mineral deposits. In geology, druse, also known as drusy or druzy, refers to a coating of fine crystals on a rock fracture surface, vein or within a vug or geode. Druse occurs worldwide; the most common is perhaps quartz druse within voids in chert or agates.