Ring with sapphire, 6 diamonds and 6 octagonal diamonds

Ring with sapphire, 6 brilliant cut and 6 single cut diamonds, totalling 0.24 ct (punched), ca. WHITE (H)/SI, sapphire round faceted, D: ca. 5.5 mm, 14K white gold, 5.9 g, ring size: 50, 20th/21th century, slight signs of wear.