An early 20th century natural pearl and diamond spray brooch

An early 20th century natural pearl and diamond spray brooch, set with a black pearl within diamond-set border and diamond-set sprays terminating in pear-shaped rose-cut diamonds millegrain-set in platinum, 6cm long

Accompanied by report number 79178-36 dated 27 September 2018 from GCS, London stating that the grey pearl measures 10.2 x 9.4 x 8.5mm and is natural saltwater with no indications of treatment.