Ring with opal surrounded by 14 brilliant-cut diamonds, totalling approx. 0.70 ct, RW (F-G)/VS, opal approx. 12 x 8 mm, beautiful play of colours, small cracks, 18K white gold, 5.9 g, ring size: 50, W: approx. 2.4 - 17.9 mm, 2nd half of the 20th century, signs of wear, with hallmark, ring size change visible.