R777 Sample ID R777 • Cabinet A Slate 15.515cm W x 14.254cm H x 0.483cm D • 166g Sample TypeRockRock QualityMetamorphicTextureFoliated Grain SizeFineColorDarkGrain Sorting mohs 3 The rock is triangular shaped and is pretty thin. You can see bits of various layers that make up the rock. The rock is grey in color. Description of Mohs scale here