Ring by Margot McKinney Jewelry. 18-karat white gold. Prong-set natural opal center. Pavé diamonds, peridots, tsavorites, and sapphires trim setting. 13. 98 total opal carat weight. 8. 99 total sapphire carat weight. 1. 33 total peridot carat weight. 0. 52 total tsavorite carat weight. 0. 23 total diamond carat weight.