R746 Sample ID R746 • Cabinet C Red Sandstone 6.563cm W x 10.326cm H x 4.574cm D • 382g Sample TypeRockRock QualitySedimentaryRock TypeClastic CompositionMineral grainsGrain SizeFineGrain ShapeRounded Grain SortingWell sortedAcid ReactionNoMohs Hardness 3 It is a rust red rock with a gritty, rough feel to it. Has somewhat angular, sharp edges on most sides of the rock, though one side is smoother than the other sides. Description of Mohs scale here