NEW YORK — Big diamonds sparkled during Christie’s sale of Magnificent Jewels in New York on Tuesday. Leading the way was a pear-shaped D color flawless diamond of 50.52 cts., which sold for $9.5 million, or $188,000 per carat, to a private collector. The stone is mounted in platinum and may be worn suspended from a necklace with a 2.28 carat, circular-cut D-color diamond surmount.
