An Australian opal and gold brooch, by Timothy T Jones, George Street Sydney, circa 1880, set with an oval Queensland boulder opal surrounded by beading and engraving, marked 'T.T./& Son', yellow gold. Provenance: Leonard Joel Auction, 28 Nov 1990 Reference: illustrated K. Cavill, G. Cocks and J. Grace Australian Jewellers, Gold & Silversmiths-Makers & Marks,1992, Plate 149