R207 Sample ID R207 • Cabinet B snowflake obsidian 47.5cm W x 22.4cm H x 44.9cm D • 56g Sample TypeRockRock QualityIgneousRock TypeExtrusive CompositionFelsicTextureGlassyColor IndexDark Clast SizeAcid ReactionMohs Hardness 6 small angular chunk of obsidian tapering down to a point on one corner. covered in small starburst white spots. Description of Mohs scale here