A solid crystal opal set brooch / pendant, 18ct yellow gold, made as a detachable drop which converts to a pendant and top bow style gold brooch, the opal of oval cabochon cut, crystal material with beautiful blue,violet and green spectral colours throughout, measuring 18.6 x 11.5 mm, claw set in an open backed mount, framed by swirled gold, fitted with bail acting as connection to the bow top brooch, fitted with pin