MN635 No Image! Sample ID MN635 • Cabinet T Gypsum 7.5cm W x 23.5cm H x 4.5cm D • 1088g Sample TypeMineralColorColorlessLusterSilky StreakWhiteCleavage/FracturePerfect Cleavage and Splintery FractureSpecific Gravity2.3 Geographic Location/DateNA NAMohs Hardness 2 A colorless sample of Gypsum. Luster is silky in nature, with a white streak. Has perfect cleavage and splintery fracture. Description of Mohs scale here