Description
MARCUS & CO. Platinum, Black Opal, and Diamond Brooch MARCUS & CO. Platinum, Black Opal, and Diamond Broochcentering an oval cabochon black opal measuring approx. 25.40 x 17.82 x 4.75 mm. framed by old European-cut diamonds; approx. 1.20 cts.; signed M. & Co.; 5.57 dwts.; lg. 1 1/4 in....