mineral commodity summaries 2002 us department of the interior geological survey abrasives aluminum antimony arsenic asbestos barite bauxite beryllium bismuth boron bromine cadmium cement cesium chromium clays cobalt columbium copper diamond diatomite feldspar fluorspar gallium garnet gemstones germanium gold graphite gypsum hafnium helium indium iodine iron ore and steel kyanite lead lime lithium magnesium manganese mercury mica molybdenum nickel nitrogen peat perlite phosphate rock platinum potash pumice quartz crystal rare earths rhenium rubidium salt sand gravel scandium selenium silicon silver soda ash sodium sulfate stone strontium sulfur talc tantalum tellurium thallium thorium tin titanium tungsten vanadium vermiculite yttrium zinc zirconium gale a norton secretary for sale by government printing office washington dc 20402 any use trade product or firm names in this publication is descriptive purposes only does not imply endorsement charles g groat director united states published eastern region reston va manuscript approved january 25 contents page general growth rates leading coincident indexes products 3 role nonfuel minerals
