Andreoli opal and multi-stone ring. Polished 18-karat white gold hardware. Sapphire, amethyst and tsavorite pavé. Prong-set blue opal oval at center. 0. 86 total amethyst carat weight. 1. 42 total tsavorite carat weight. 2. 53 total sapphire carat weight. 17. 24 total opal carat weight.