A Victorian crescent brooch set with cabocon cut opals and old cut diamonds in rose gold. The opals are predominantly blue/green/orange in colour and graduate in size from approx. 6.2mm x 5.5mm at the centre down to 2.0mm x 3.00mm at each end. Between each opal are pairs of rose cut diamonds set one above the other before terminating with a single diamond at each end. A bead and rope twist gallery. Curved pin with hinged fastening to a C scroll catch. No hallmarks, tests as approx. 9ct gold, with "9ct" marked to the back of the brooch

Victorian Opal and Diamond Crescent Brooch