MN790 Sample ID MN790 • Cabinet T Tourmaline in Muscovite 14.2cm W x 11.9cm H x 0.7cm D • 189g Sample TypeMineralColorGreenish BlackLusterShiny StreakWhiteCleavage/FractureCleavageSpecific GravityN/A Geographic Location/DatePortland CT Mohs Hardness 2 White flat flakey sheet of Muscovite with greenish tourmaline. Description of Mohs scale here