R772 Sample ID R772 • Cabinet A Slate 9.6cm W x 13.662cm H x 5.192cm D • 1374g Sample TypeRockRock QualityMetamorphicTextureFoliated Grain SizeFineColorDarkGrain Sorting mohs 3 The rock is somewhat shaped like it was formed or metamorphised in a slight curve or bend. The rock is dark grey in color and you can striation occurring horizontally and vertically. Description of Mohs scale here