1) 10K yellow gold ring features a large blue cushion cut synthetic sapphire, measuring 16.22 x 13.92 x 6.13 mm, set in a multi-prong mounting, sz. 6, 2) 10K yellow gold ring centers an oval cut blue topaz set in a ribbon design with synthetic diamonds on the side, sz. 7.25, and 3) 10K yellow gold ring features a round cut imitation amethyst prong set in center with synthetic diamonds on shoulders, sz. 8, 12.6 grams tw