This assortment of 10 raw Obsidian flakes are suitable for the flintknapping of arrowhead or atlatl sized projectile points.  These are selected from large biface knapping debris, so be free of cracks or flaws, and within the angles to become good enough preforms to knapp to small size bifaces.  Edges are raw and dangerously sharp so buyer is responsible for safe use of this material.  Obsidian originally from Glass Buttes, Oregon.