Gold gained 150 rupees, to 31,200 rupees per ten grams at Delhi's bullion market, today, on fresh buying by jewelers, amid firm global cues. Silver ended a four-day losing streak, gaining 200 rupees, to 45,400 rupees per kilo, on increased offtake by industrial units and coin makers. Silver coins spurted 1,000 rupees, to 75,000 rupees for buying 100 pieces. Overseas, gold rose 0.1 per cent, to 1,340 dollars an ounce. Silver added 0.7 per cent, to 19 dollars an ounce.