A ruby and diamond half-hoop ring

A ruby and diamond half-hoop ring, set with three graduated oval-shaped rubies and four cushion-shaped diamonds in carved yellow gold shank, size R 1/2

Accompanied by report number 78177-03 dated 17 September 2018 from GCS, London stating that the three oval-shaped rubies measure 5.5 x 4.5 x 3.1mm, 6.3 x 5.1 x 4.0mm and 5.6 x 3.8 x 3.2mm, weigh approximately 2.30cts total and are natural rubies with no indications of heat treatment. Origin: Thailand (Siam)