MN302 Sample ID MN302 • Cabinet E Sphalerite 8.181cm W x 5.761cm H x 6.793cm D • 642g Sample TypeMineralColorBlack and shiny with orange-y areas and flouresces. When broken off it is transluscent and brown.LusterSubmetallic on crystals. Resinous on fracture. StreakLight brownCleavage/Fractureisometric crystals and uneven fractureSpecific Gravity3.275 Geographic Location/DateTagil Siberia Mohs Hardness 4 Decent sized hunk of rock with layers of sphalerite on both ends. Between there is a mystery mineral/rock and something that is possibly quartz. The Sphalerite appears black and metallic on the crystal faces. If you look closer you can see sLight fluoresces of orange inside some of the crystals. When pieces are broken off it is apparent that the sphalerite is in fact a translucent brown color. Description of Mohs scale here