Black Nephrite or jade. Wedge shaped adze. Broken chips on edge, and back end is broken. 4 1/2"L x 3"W x 1 1/4"D. One side has gouge - possibly caused by heat of fire, and is sticky. Learn more about how at http://www.museums.state.ak.us/documents/concepts/concepts_05_spring_1999_no_09.pdf >Jade has been used in Alaska.