Diamond and Natural Baroque Pearl Art Nouveau Brooch Consign Now DeptJewelrySold$1,800 SOLD FOR $1,800 Lady’s Antique 18k Yellow Gold and Platinum Diamond and Natural Baroque Pearl Art Nouveau Brooch, with three small 6mm-8mm white Baroque pearls and 28 small old mine cut diamonds with an approximate total weight of 1.80cts. Please note that this auction has ended. Click here for an overview of this auction.