12 flakes of various materials, suitable for flintknapping arrowhead and small atlatl dart sizes.  Included above are a sample of Basalt, Danish Flint, Mohagony Obsidian, Flint River flint, Knife River flint, Dacite, and Burlington Chert.  See pics for measurements.  Each one has enough mass to make an average sized arrowhead, with no flaws to start with.