FILE PHOTO: A worker stores ingots of 99.99 percent pure

FILE PHOTO: A worker stores ingots of 99.99 percent pure silver, which weigh 30 kilos (66 lbs), to pack them at the Krastsvetmet nonferrous metals plant in Russia’s Siberian city of Krasnoyarsk, March 28, 2011. REUTERS/Ilya Naymushin/File Photo