White gold, diamond. Fineness Au 585 / 1000. Total weight of 4.25 grams. Massive ring, slightly enlarged in the upper half. At the top a round, arched, tall crown. Decorated with vertical curved arches. Finished on the front with a flat round frame. Centrally placed circular diamond of old brilliant cut, weighing 1.20 ct., Purity VS 2, color J - K. Labeled hallmark, purity, brand jeweler. Czechoslovakia 1949 - 1992. Size of the ring 57. Expert opinion.