RAPAPORT... A 76.46-carat diamond necklace is expected to fetch up to $6 million at the upcoming Christie’s New York Magnificent Jewels sale.The piece features a heart brilliant-cut, D-color, VVS2-clarity, type IIa diamond center stone, accompanied by 46 stones of the same shape ranging from 0.46 to 3.03 carats. It will be one of the top items at the June 8 jewelry auction, Christie’s said last we...
