The Art Deco Brooch has no markings, but was tested with with acid and a " Kee" TESTER to be solid Platinum. It weighs 10 grams and it measures 2 1/8" x 11/16". In the center is a 5.5 mm pearl. There are 4 round European cut natural diamonds set on each side of the pearl. The 8 Euros have an approx total weight of .80 cts. There are a total of 54 rose cut natural diamonds with an approx total weight of .81 cts. Last. Near each corner are 8 blue natural sapphires with an approx total weight of .28 cts. This piece is in excellent condition.