A pearl and diamond oval star pendant brooch in

A pearl and diamond oval starburst pendant brooch, the central half-pearl with pair of old-cut and rose-cut diamonds surrounded by a row of half-pearls, framed by alternating rays of diamonds and pearls, estimated total diamond weight 3.40cts, gross weight 17.9 grams, with fittings to covert to brooch or pendant, circa 1860

No. 25975M