- Mother-of-pearl: total weight: 12.06-carats; round-cut G-H SI diamonds, total weight: 0.52-carats; sapphires, total weight: 1.63-carats; amethyst, total weight: 0.25-carats; tsavorite, total weight: 0.23-carats - Lobster clasp fastening - Mother-of-pearl: Australia - This piece has been certified in accordance with the Hallmarking Act 1973