An American Art Deco style diamond and sapphire plaque brooch/pendant, with a brilliant cut diamond, milligrain set to the centre. Pierced radiating lines and fret with milled blade edge bar and brilliant cut, old European cut and eight cut diamonds, milligrain set throughout. Four sets of three calibré cut sapphires to a double ogee framework. A pin, lever clasp and concealed wire bale. Tested as approximately platinum. Pin as approximately 10ct gold. 61 x 25mm, 9.20g Condition report: Dirty at the concealed bale. Back - possible solder at the clasp join. The setting edge is deficient from one end of a row of sapphires. In my opinion reproduction. Diamonds are not well matched for cut or clarity.