So lustrous, they appear to glow from within—much like a bride

White South Sea cultured pearl necklace with 18kt white gold–and-diamond center, $45,600, by Mikimoto, mikimotoamerica.com. Platinum, 18kt-pink-gold, and diamond pin with eggplant Tahitian pearl and natural pink diamonds, $30,000, by Gumuchian, gumuchian.com.