A sapphire and diamond half hoop ring, mid 20th century, set with three graduated oval-shaped

A sapphire and diamond half hoop ring, mid 20th century, set with three graduated oval-shaped sapphires separated with pairs of diamonds in white gold, size L Accompanied by GCS report no. 5782-2915 dated 12th September 2022, stating the cushion cut sapphire is a natural corundum with no indication of heating.