It is known that two blue stars are meant to represent and honor two active military family members. This mid-century Oscar Heyman Brothers diamond, ruby, sapphire, platinum, and 14 karat gold 'Blue Star' military brooch has that eternal pride written all over it. Stamped with serial number 29580. Circa 1942. 1/2" in length by 3/8" in height. Diamond weight approx. .10 carats. Ruby weight approx. 1.38 carats. Sapphire weight approx..50 carats.