An Edwardian diamond bar brooch, centring a claw set old mine cut diamond of approx. 1.03ct, J/P1 adjacent to 22 old European cut diamonds totalling approx. 1.75ct, Si-P1, (1 chipped,) stamped 15 plat and a star, tests for a mix of gold and 63% platinum, length 70 mm, wt. 5.67g.