R724 Sample ID R724 • Cabinet B Tuff 8.709cm W x 8.921cm H x 2.542cm D • 356g Sample TypeRockRock QualityIgneousRock TypeExtrusive CompositionFelsicTexturePyroclasticColor IndexLight Clast SizeAcid ReactionMohs Hardness 8 Almost completely square shaped, light colored. Evidence of mineral formation throughout the rock and some pyroclastic material. Description of Mohs scale here