Sapphire Diamond Ring Noble design, signed Frischknecht, St.Gallen, in yellow gold 18K. Designer ring with oval sapphire of about 1.5 ct (commercially treated). In beautiful symmetry are Carré diamonds and brilliants of add. approx. 0.5 ct (G/VS1) in Pavé on the front side in the rail. Ring size 57, 13 g.