Blue Peruvian Opal is a rarer stone to find and very lovely. It varies from light blue to a coppery-brown. This set includes 13 nuggets of Peruvian Opal as well as copper beads, clasp and ear wires. This stone is associated primarily with the Throat Chakra and was believed by many to be a stone of courage, ingenuity and self-esteem. The necklace is 18 inches on a toggle clasp.