Stunning in it's simplicity, this 18-karat gold Australian boulder opal necklace is 32.5 inches long. These one-of-a-kind boulder opals are mined in Yowah, Queensland, Australia. The hand-hammered aquamarine crystal is from Brazil. There is no clasp on this extremely easy to wear necklace! Just throw it on and go! This necklace is fabulous worn daytime or evening!