R669 Sample ID R669 • Cabinet B Pegmatite 6.383cm W x 11.891cm H x 5.618cm D • 926g Sample TypeRockRock QualityIgneousRock TypeIntrusive CompositionFelsicTexturePegmatiticColor IndexLight Clast SizeAcid ReactionMohs Hardness 2 Kind of shaped like a triangle or slice of cake. It is mostly crystal, the colors of the crystal go from yellow to green. There is a layer of white on top, and some mica towards the back of the rock. Description of Mohs scale here