An early 20th century synthetic ruby and diamond flower brooch

central rubover set old European cut diamond, surrounded by six pear shaped synthetic rubies with a single cut diamonds in between, curved crossover white and yellow metal bar, terminating in a rubover set old European cut diamond, estimated approximate weight 0.11ct each, length 5.6cm, width 1.7cm, pin and hook fitting with hinged safety catch, unmarked, tested as 18ct gold with platinum settings and a 9ct gold pin, weight 5.7g