Tiffany & Co. Cultured Pearl, 18k Yellow Gold Cat Brooch. Designed as a cat playing with a cultured pearl ball, the cultured pearl measuring approximately 7.5 mm, set in an 18k yellow gold Tiffany & Co. textured mounting measuring approximately 52 x 31 mm. Accompanied by original Tiffany & Co. box. {Gross Weight: 10.1 dwts}