MN605 Sample ID MN605 • Cabinet Z Silver 4.95cm W x 9.05cm H x 5.2cm D • 456g Sample TypeMineralColorGreyLusterMetallic StreakGreyCleavage/FracturePerfect basal cleavage and hackly fractureSpecific Gravity5.8 Geographic Location/DateSilverton San Juan CO Mohs Hardness 4 A grey metallic mineral. Nonmetallic and becomes clouded when hit with a flame. Has perfect basal cleavage and a hackly fracture. Streak is grey. Description of Mohs scale here