Snapping a six-day record-setting spree, gold retreated from an all-time high, falling 390 rupees, to 26,100 rupees per ten grams at Delhi's bullion market, on Friday, on reduced domestic offtake, amid a weak global trend. Silver dropped 100 rupees, to 59,100 rupees per kilo.Overseas, gold shed 0.9 per cent, to 1,748 dollars an ounce, after the Chicago Mercantile Exchange, the world's largest futures market, raised margins on gold contracts to curb sky-rocketing prices.