R793 Sample ID R793 • Cabinet A Glacial Basalt 5.086cm W x 8.186cm H x 3.172cm D • 242g Sample TypeRockRock QualityIgneousRock TypeExtrusive CompositionMaficTextureColor IndexDark Clast SizeAcid ReactionMohs Hardness 5 It is a small rectangular rock that is on a small incline. It has faulting lines on one of the sides from a glacier grinding along that side of the rock. It is dark grey in color. Description of Mohs scale here