R663 Sample ID R663 • Cabinet B Granite 10.315cm W x 9.147cm H x 5.396cm D • 900g Sample TypeRockRock QualityIgneousRock TypeIntrusive CompositionFelsicTexturePhaneriticColor IndexDark Clast SizeAcid ReactionMohs Hardness 7 It is rectangular/square-like, mostly black/dark grey with some light grey/clear crystals, and pinkish/reddish crystals. About medium sized rock. Description of Mohs scale here