Gold rose 150 rupees, to 31,000 rupees per ten grams at Delhi's bullion market, today, on fresh buying by stockists, amid a firm global trend. Silver gained 400 rupees, to 58,800 rupees per kilo, on increased offtake by jewellers and coin-makers. Silver coins climbed 1,000 rupees, to 83,000 rupees for buying 100 pieces.