... It is widely used in selection of Tin, tungsten, gold, silver, lead, zinc, tantalum, niobium, iron, manganese ... is used for selecting rare and valuable metals including gold, silver, lead, zinc, tantalum, niobium and ... efficient is a gravity concentrating table compared to a gold pan? Well, using a full sized ... 20-30 times more efficient than a gold pan. In gold and mineral applications, a full sized ...