You can't get much better than Eisenberg, this lovely brooch or pin signed on back "Eisenberg" and in wonderful condition. It is of a silver metal of unknown content not sterling of course, no tarnish, and the prettiest blue stones of a sapphire blue and a lighter deep sky blue or blue topaz color, all very brilliant and in great condition. All the stones are prong set and all original. The pin fastener on the back is in good working order. This rare and fabulous piece measures 1 & 1/2" across. The photos do not do justice to this wonderful item, I just could not get the brilliant blue color right, and my lights kept dulling the brilliance of the stones. The outer group of the sapphire color are a deep color, and the inner group of blue topaz color stones also very sparkly and brilliant with depth of color. Very rare piece to find in these colors, and it is Eisenberg ! I bought this over 30 years ago from a local antique dealer who had some fabulous costumer jewelry.