MN421 Sample ID MN421 • Cabinet F Datolite 8.763cm W x 3.497cm H x 5.011cm D • 146g Sample TypeMineralColorWhiteLusterPearly to Vitreous StreakWhiteCleavage/FractureNone/ConchoidalSpecific Gravity2.21 Geographic Location/DateBergen Hills NJ Mohs Hardness 5 Medium sized specimen with large white spheroidal crystals that have a pearly to chalklike luster. Large rock groundmass. Description of Mohs scale here