Margot McKinney Jewelry pear-cut ring. Polished 18-karat yellow gold hardware. Prong-set pear-cut boulder opal center. Diamond, sapphire and cabochon pavé. 12. 33 total boulder opal carat weight. 5. 57 total yellow sapphire carat weight. 4. 24 total orange sapphire carat weight. 0. 26 total diamond carat weight. Tapered, half-round shank.