Gold tumbled 800 rupees, to a nine-month low of 28,550 rupees per ten grams at Delhi's bullion market, today, after the Reserve Bank eased import norms, and on sluggish demand and subdued global cues. Silver dipped 50 rupees, to 41,650 rupees per kilo. Silver coins continued to be asked at the previous level of 79,000 rupees for buying 100 pieces.