This blue topaz and diamond halo station necklace from the Margarita Collection is crafted in 10-karat white gold and features a round-cut, prong-set London-blue topaz at the centre of its 32 round-cut, prong-set diamonds in a unique halo station necklace design. Enhanced with a high polish finish, this necklace is sure to make a perfect versatile addition to any jewelry collection.