Gold rose 200 rupees, to a fresh all-time high of 30,400 rupees per ten grams at Delhi's bullion market, on Wednesday, on brisk buying by stockists, triggered by a firm global trend. Silver climbed 1,200 rupees, to 55,500 rupees per kilo, on increased offtake by industrial units and coin makers.In London, gold jumped 1.3 per cent, to a four-week high of 1,637 dollars an ounce, on a weaker dollar, after officials from the world's leading economies said they will collaborate to respond to Europe's crisis. Silver gained 2.7 per cent, to 29.31 dollars an ounce.