SynaBaubles Big Diamond Blue Topaz EarringsDetailsThe beauty of each Syna piece is its striking simplicity. These versatile 18k gold blue topaz Syna earrings-detailed with diamonds-will take you from the beach, to brunch, to the ballet. From the Syna Baubles Collection. 18-karat yellow gold. Champagne pave diamond dome, 6mm. Polished blue topaz cabochon drop, 12mm. Topaz, 15. 0 total carat weight. Diamonds, 0. 50 total carat weight. 7/8"L overall.