AN ANTIQUE DIAMOND BROOCH Centering an old mine-cut diamond weighing approximately 1.40 carats, further set with old mine, old European, and single-cut diamonds, weighing approximately 3.60 carats, approximate total weight 5.00 carats, in silver-topped gold, weight 5.5 dwt, length 1 1/8 in. For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing