MN404 Sample ID MN404 • Cabinet F Ruby Sphalerite 24.61cm W x 6.98cm H x 11.351cm D • 2622g Sample TypeMineralColorReddish BrownLusterVitreous nearly Adamantine StreakReally Light BrownCleavage/FractureRhombohedral/UnevenSpecific GravityNA Geographic Location/DateJoplin Missouri Mohs Hardness 5 Large reddish-brown Ore of Zinc. The top is incased with tiny Dark red crystals. There is a large layer of Zinc sulfide. The bottom is incased completely with glassy to milky calcite. Description of Mohs scale here