A sapphire and diamond cluster ring, 12.97cts, certification: Sri Lanka, no heat

A sapphire and diamond cluster ring, centred with a cushion-shaped sapphire weighing 12.97cts, in an openwork double surround set with graduated old circular-cut diamonds in platinum, size M

Accompanied by report number 79216-27 dated 21 June 2019 from GCS stating that the cushion-cut sapphire weighs 12.97cts and is a natural sapphire with no indications of heat treatment. Origin: Sri Lanka (Ceylon)