R774 Sample ID R774 • Cabinet A Serpentinite 27.5cm W x 37.6cm H x 2.518cm D • 6860g Sample TypeRockRock QualityMetamorphicTextureNon-foliated Grain SizeFineColorDarkGrain Sorting mohs 3 The rock is a big slab or rock that is mostly black or dark grey in color with streaks of green running through the rock Description of Mohs scale here