An early 20th century natural pearl and diamond cluster ring

An early 20th century natural pearl and diamond cluster ring, the natural half pearl set within a surround of circular-cut diamonds in platinum and gold, size L

Accompanied by report number 80258-59 dated 6 March 2020 from GCS stating that the cream half pearl measures 7.7 - 7.8 x 6.0mm and is natural saltwater with no indications of treatment.