Opal-inlay jewelry is inlaid with blocked-out crystal opal. The back of the setting is coloured black so that when set, the opal is enhanced, appearing brighter. Inlay is popular in gold and silver as well as in ironstone pendants. When solid natural crystal opal from Lightning Ridge is set in natural potch, the potch has a hole hand-drilled to fit the opal and the back has been blackened to enhance the colour.
