MN304 Sample ID MN304 • Cabinet E Heulandite 7.305cm W x 3.421cm H x 4.377cm D • 104g Sample TypeMineralColorWhiteLusterGlassy StreakWhiteCleavage/FractureCleavage (Coffin-shaped)Specific Gravity2.465 Geographic Location/DateTeigarham Iceland Mohs Hardness 4 White shiny crystals on one rock face. Back is almost sandy and white. Bottom is rock like and black. Description of Mohs scale here