R806 Sample ID R806 • Cabinet V Armored Mudball 11.826cm W x 18.3cm H x 2.975cm D • 1240g Sample TypeRockRock QualitySedimentaryRock TypeClastic CompositionRock fragmentsGrain SizeMediumGrain ShapeRounded Grain SortingWell sortedAcid ReactionNoMohs Hardness 5 Its a rectangular rock that was cut to show the armored mudball pieces inside. Description of Mohs scale here