EXCLUSIVELY AT NEIMAN MARCUS "Positano" bypass ring by ISTANBOULLI GIOIELLI. Polished 18-karat yellow gold band and settings. Marquise-cut ruby with Vs+/G+ diamond halo. One round white diamond at opposite end. 0. 23 total diamond carat weight. 0. 30 total ruby carat weight. Approx. 0. 8"H; 0. 5"W. Made in Italy.