A Belle Époque natural pearl and diamond ring

A Belle Époque natural pearl and diamond ring, the vertically set three stone pearl, accompanied by a Gem and Pearl Laboratory certificate number 09939 stating the 1.95 carats pearl to be a natural saltwater, and two old brilliant-cut diamonds either side estimated to weigh a total of 1.5 carats to a millegrain setting in a platinum pierced Hellenic pattern diamond-set mount, estimated to weigh a further total of 0.8 carats, gross weight 6.5 grams,