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Date: 2014-06-12 08:50:04Mineralogy Nature Matter Mineral Dry lubricants Pyrite group Sulfide minerals Geochemistry Graphite Carbon Pyrite Weathering | Rocks and Minerals of PennsylvaniaAdd to Reading ListSource URL: www.panaturekids.orgDownload Document from Source WebsiteFile Size: 2,56 MBShare Document on Facebook |