An antique diamond set plaque brooch, 18ct white gold, stamped to reverse, early 20th century, made as a rectangular framed plaque brooch with central foliate swag motif, featuring a bezel set old cut diamond of approx 0.75ct, two swagged arrangements of smaller mine cut and old cut diamonds in a leaf and tendril design, the outer edge grain set with vertical rails, below on frame a smaller old cut of 0.30ct, and to upper three spaced and bezel set, completed with pin to reverse. Length 4.5 cm A.T.D.W.: 3.30ct.