R882 Sample ID R882 • Cabinet B Lamprophyre 7cm W x 8cm H x 3.5cm D • 278g Sample TypeRockRock QualityIgneousRock TypeIntrusive CompositionMaficTexturePorphyriticColor IndexDark Clast SizeAcid ReactionMohs Hardness 5 Dark grey coarse rocks with lighter coloration mixed in that sparkles in the light. Description of Mohs scale here