Jewellery, Watches, Silver & Objects of Vertu

A pair of early 20th century agate and diamond dress studs, French, the circular plaques set with polished agate and with rose-cut diamond demi-lunes to the cardinal points, to hinged T-bar terminals, mounted in platinum and gold, French assay marks, case by A. Risler & Carré, Paris, plaque diameter 9mm. £100-£150