R770 Sample ID R770 • Cabinet A Graphite Schist 18cm W x 20cm H x 3.612cm D • 1570g Sample TypeRockRock QualityMetamorphicTextureFoliated Grain SizeMediumColorLightGrain Sorting mohs 1 The rock is a round somewhat flat rock with a small slope from one side of the rock to the other. And the color is silvery grey and has a shiny sheen. Description of Mohs scale here