Exceptional ring with lapis lazuli and brilliant-cut diamonds totaling approx. 2.3 ct,

Exceptional ring with lapis lazuli and brilliant-cut diamonds totalling ca. 2.3 ct, ca. WHITE (H)/VVS, 1 stone chipped, 18K yellow and white gold, 20.7 g, ring size 63, high hemispherical shape D: 2.5 cm, H: 1.8 cm, 2nd half of 20th century, signs of wear, handcrafted.