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This is a beautiful specimen consisting brown botryoidal MOTTRAMITE completely covering CALCITE crystals on most sides of a pale red brown matrix from the Ojuela Mine, Mapimi, Mapimi Municipality, Durango, Mexico. The specimen is 4.9 by 3.4 by 2.6 cms in size or about 1.96 by 1.36 by 1.4 inches and weighs 54.2 grams.