Gold fell 160 rupees, to 28,340 rupees per ten grams at Delhi's bullion market, on Thusrday, on emergence of selling by stockists, upon weak global cues. But silver added 150 rupees, to 64,500 rupees, per kilo.In the global markets, gold fell 0.8 per cent, to 1,768 dollars an ounce. Gold dropped after the US Federal Reserve pledged to buy long-term debt worth 400 billion dollars, pushing up the American currency.