R671 Sample ID R671 • Cabinet B Dacite 7.31cm W x 9.159cm H x 4.933cm D • 294g Sample TypeRockRock QualityIgneousRock TypeExtrusive CompositionIntermediateTextureColor IndexLight Clast SizeAcid ReactionMohs Hardness 6 Somewhat of a lopsided square-like shape, on the small side. It is light grey with some small vesicular gas bubbles interspersed throughout the rock and a few very small crystals Description of Mohs scale here