A large sapphire and diamond cluster ring

A large sapphire and diamond cluster ring, the cushion-shaped sapphire is set within two borders of round brilliant-cut diamonds in yellow gold, size R 1/2

Accompanied by report number 78132-91 dated 29 November 2019 from GCS, London stating that the cushion-cut sapphire weighs 17.05cts (as stated by the client) and is a natural sapphire with no indications of heat treatment. Origin: Sri Lanka (Ceylon)