MN697 Sample ID MN697 • Cabinet H Quartz 5.75cm W x 5.23cm H x 4.62cm D • 230g Sample TypeMineralColorWhite, GreenLusterVitreous StreakWhiteCleavage/FractureNone / ConchoidalSpecific Gravity2.73 Geographic Location/Date Mohs Hardness 7 A large piece of quartz mineral. This specimen is white, with some spots clear. There appears to be a section of Malachite on one edge, as it has a hardness of 3.5. The specimen is mostly vitreous, but dull in some spots. Description of Mohs scale here