Rising for the tenth straight day, gold gained 25 rupees, to 26,335 rupees per ten grams at Delhi's bullion market, on sustained buying by jewelers, and a firm global trend. But silver slumped 650 rupees, to 35,300 rupees per kilo. Silver coins remained steady, at 50,000 rupees for buying 100 pieces. Overseas, gold rose slightly, to 1,119 dollars an ounce.