MN789 Sample ID MN789 • Cabinet T Tourmaline 6.12cm W x 6.16cm H x 6.2cm D • 205g Sample TypeMineralColorBlackLusterShiny StreakWhiteCleavage/FractureCleavageSpecific Gravity1.44 Geographic Location/DateMarlow NH Mohs Hardness 5 Cleaved Black Tourmaline with small white bits throughout. Description of Mohs scale here