R673

Sample ID R673 • Cabinet B

Obsidian

5.611cm W x 9.644cm H x 3.299cm D • 164g
Sample TypeRockRock QualityIgneousRock TypeExtrusive
CompositionFelsicTextureGlassyColor IndexDark
Clast SizeAcid ReactionMohs Hardness 6

Wedge like shape that is nearly entirely glassy on one side and the other is mostly raw. Has some scallop like lines in the glass.