Late Victorian topaz enamel and seed pearl brooch, 15ct yellow gold pendant, bezel-set with an exceptionally rare and large colourless round mixed-cut topaz, approx. 88.45cts. Surrounded by a border of green enamel and an outer layer of 32 natural half pearls. Minor damage to the enamel and stamped '15ct', diameter 3.6 cm. GSL valuation, original grey box