R670 Sample ID R670 • Cabinet B Larvikite Monzonite 15.191cm W x 9.406cm H x 2.687cm D • 1010g Sample TypeRockRock QualityIgneousRock TypeIntrusive CompositionIntermediateTexturePorphyriticColor IndexIntermediate Clast SizeAcid ReactionMohs Hardness 6 It is a relatively small slab shape. Mostly dark colored. Mix of black and grey, mostly grey crystals. The grey crystals in certain light looks like a shimmery light blue Description of Mohs scale here