Gold futures on the COMEX Division of the New York Mercantile Exchange dropped for the third consecutive session on Tuesday as continued rally in U.S. dollar eroded demand for the bullion as an alternative asset. Fresh concerns over a surprise decision by Greek Prime Minister to put the country\'s latest bailout plan to a referendum offered some support. The most active gold contract for December delivery dropped 13. 4 dollars, or 0.8 percent, to 1,711.8 dollars per ounce.