Black Obsidian Cobble - Spalled Face Solo/Pair:Solo (1 pc) has been a renowned source

has been a renowned source of fine mineral specimens since the late 19th century

There is also a view window covered with a thin strip of transparent glass

Formed in the ancient limestone of northern Mexico

Description: Iridescent goethite from Tharsis

Black Obsidian Cobble - Spalled Face Solo/Pair:Solo (1 pc) has been a renowned sourceMined from: Burns, Lake County, Oregon, U. S. A. Description: Black obsidian from the Burns area of Oregon is a natural volcanic glass with a clean, dark body color and a bright vitreous luster. A spalled face shows the fresh interior where the stone has broken with the curved, shell like fracture obsidian is known for, giving it sharp edges and a raw, glassy surface. It has a stark, clean look that makes it popular for display, flintknapping, and