A Victorian natural pearl and diamond stick pin

A Victorian natural pearl and diamond stick pin, the natural half pearl set within a surround of old cushion-shaped diamonds in gold, the cluster unscrews from the stick pin, 7cm high

Accompanied by report number 79206-12 dated 1 April 2019 from GCS stating that the cream half pearl measures 6.9-7.0 x 4.8mm and is a natural saltwater half pearl with no indications of treatment.