Large antique rose cut diamond & silver brooch, unmarked. Approx brooch width 22 mm x1 6 mm (0.75ct), x7 3.4 x 4 mm (=1.00ct) total 1.75ct estimated, tests as 870 silver, brooch, unmarked. Approx brooch width 22 mm x1 6 mm (0.75ct), x7 3.4 x 4 mm (=1.00ct) total 1.75ct estimated, tests as 870 silver