Natural volcanic glass from the American West. Consistent but somewhat brittle, obsidian produces a chipped stone blade of scalpel sharpness. Color primarily black some with sheen. May contain some dacite, which is also a form of obsidian.
NOTE: You will need a billet of some type to reduce this material to blades or flakes for pressure flaking.
#1 grade 3"-6" mixed spalls and preforms.......$4.00/lb