An emerald and diamond pendant

An emerald and diamond circular pendant, the centre a square mixed-cut emerald set in yellow gold with millegrain border, surrounded by a border of old brilliant-cut diamonds in an openwork setting forming a scalloped edge in silver to yellow gold back, suspended from a diamond-set loop, estimated total diamond weight 2.9cts, estimated total emerald weight 2cts, Circa 1900, gross weight 5.9 grams

No. 26526M