R689 Sample ID R689 • Cabinet B Pillow lava 13.25cm W x 23cm H x 13.262cm D • 3304g Sample TypeRockRock QualityIgneousRock TypeExtrusive CompositionMaficTextureVesicularColor IndexDark Clast SizeAcid ReactionMohs Hardness 6 It is somewhat shaped like a lumpy pillow. Rust red color towards the top of the rock and light grey towards the bottom of the rock Description of Mohs scale here