From top: Bulgari’s 18k yellow gold, pearl and diamond necklace, price available upon request, at Bulgari, 800.BVLGARI, bulgari.com; Tiffany & Co.’s platinum, conch pearl and shell, and diamond brooch, $140,000, at Tiffany & Co., 800.526.0649; Van Cleef & Arpels’s platinum, Tahitian pearl and diamond ring, $83,000, at Van Cleef & Arpels, 877.VANCLEEF, vancleef-arpels.com; Cynthia Bach’s platinum, conch pearl and diamond brooch, $130,000, at Neiman Marcus Precious Jewels Salon, 617.536.3660. via wmagazine.com