New York: Gold futures prices for one troy ounce (31.1 grams) declined on commodity markets, APA reports. Based on the exchange data, on New York's COMEX exchange, August gold futures dropped by 0.18% to $3,446.5 per troy ounce. According to Azeri-Press News Agency, silver futures for July delivery rose by 0.12% to $36.4 per ounce on COMEX.