E-scrap can offer a materially higher metal loading/tonne compared to ores — in particular as ore grades for new mines continue to decline. For example, a primary mine for silver contains approximately 5 grams of pure metal/ton of ore. This compares to 200-250g/ton of silver in PC circuit boards, and 300-350g/ton of gold in cell phones. (Source: Barclays 23 Aug 2012, Equity Research).