Ring set with a natural round brilliant cut diamond, cut after 1929, weighing 5.16 ct. Czechoslovakian hallmark used between 1929 and 1959 (lion). High-quality jewelry work. Purity 585/1000, hallmark (lion), total weight 4.40 g. Diamond dimensions 11.02 - 11.18 x 6.75 mm, calculated weight 5.16 ct, color K, clarity VVS2, cut very good VG. Expert opinion by Dr. Jaroslav Hrouz included.