RAPAPORT... An 8.82-carat, fancy-intense-purple-pink diamond ring with a high estimate of $6 million is set to headline the New York auction at Christie’s next month.The pear modified brilliant-cut, VVS1-clarity diamond, called The Fuchsia Rose, has the potential to be internally flawless, Christie’s said last week. The auction house will offer the stone at its Magnificent Jewels sale on April 13,...