One of the highlights of Christie's Magnificent Jewels auction in New York is sure to be this superb emerald, ruby and diamond necklace by Bulgari, with an estimated value of $300-400,000.

One of the highlights of Christie's Magnificent Jewels auction in New York is sure to be this superb emerald, ruby and diamond necklace by Bulgari, with an estimated value of $300-400,000.