SOLD /The Art Nouveau brooch was tested with nitric acid and a "kee" tester to be solid 18k gold. It weighs 7.6 grams and measures 1 1/2" x 1 1/2". Bezel set in the center is a blood red lab created oval ruby that measures 11.5 x 8.5 x 4.5 mm which makes it approx 4.50 cts. The piece also has a total of 11 old mine cut natural diamonds with an approx total weight of .50 cts. It is in excellent condition.