R731 Sample ID R731 • Cabinet C Boulder Clay 6.016cm W x 11.314cm H x 5.336cm D • 326g Sample TypeRockRock QualitySedimentaryRock TypeClastic CompositionRock fragmentsGrain SizeVery fineGrain ShapeRounded Grain SortingPoorly sortedAcid ReactionNoMohs Hardness 3 Greenish grey clay. Rock fragments of varying sizes can be found throughout the rock. Somewhat shaped like a slice of pie. Description of Mohs scale here