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Mine
State County Mineral Image info
Colorado Portland Cement quarry Colorado Fremont Gypsum 1301 x 759, Gray
Colorado Portland Cement quarry Colorado Fremont Gypsum 1390 x 826, Gray
Mica Hill Mica Mine Colorado Fremont Mica 1216 x 1049, Gray
P.C. Company of Colorado Mine Colorado Fremont Cement 1218 x 944, Gray
Portland Cement & Wall Plaster Plt Colorado Fremont Cement 1209 x 905, Gray