Opal, considered ''the queen of gems,'' flashes colors in every hue of the rainbow and has long been ascribed many mystical and healing properties. This sterling silver brooch, which can be worn as a pin or as a pendant, is inlaid with iridescent white opal by our London silversmith, hallmarked for a guarantee of purity. Each will appear to flicker and change with every movement of the wearer. 18'' long, 1.25'' long pendant, spring ring clasp.