RAPAPORT... A Muzo emerald and diamond necklace is epected to sell for up to HKD 80 million ($10.3 million) when it goes under the hammer at Christie's Magnificent Jewels auction in Hong Kong on November 29.The double rivi??re piece, designed by Edmond Chin for the House of Boghossian, contains 28 perfectly cut and matched, near-flawless emeralds, weighing a total of 117.60 carats. The gems were hand-selected by Boghossian CEO Albert Boghossian, the auction house said Tuesday. Christie's expects the necklace to prove extremely popular, given it sold the Grand Muzos, a pair of earrings containing emeralds from the same Colombian mine, for almost $100,000 per carat last year."The offering of this necklace marks a major moment in the auction world, and will no doubt create a stir among global connoisseurs," Christie's said.Image: The Muzo emerland-and-diamond necklace. (Christie's)