18 Karat Opal Beaded Necklace is 18" in length with natural opal stones, translucent, rich deep color. This beautiful, delicate necklace has an 18 karat yellow gold opal clasp, with graduated sized beads from 8.1mm - 5.8mm. The color of the Opals change as light changes. The stones are full of life and are in perfect condition.