An iconic example of Jean Schlumberger’s charming designs for Tiffany & Co., the Tiffany Schlumberger Bird on a Rock Platinum and 18k Yellow Gold Diamond Citrine Clip Brooch features a 3.05 carat diamond-encrusted cockatoo perched on a dazzling 64.04-carat citrine “rock.” The bird brooch is one of the firm’s most legendary designs, showcasing Schlumberger’s whimsical aesthetic. Metal: 18k yellow gold …