5 février 2014
Black Opal and Diamond Brooch, René Boivin, Circa 1915
Black Opal and Diamond Brooch, René Boivin, Circa 1915. Photo Sotheby's The pentagon-shaped black opal measuring approximately 20.3 by 16.7 mm., the pear-shaped black opal measuring approximately 19.5 by 15.2 mm., old European-cut, single-cut and rose-cut...