This was small tile made by laminating thin layers of a white and red earthenware body and rolling them to 2.5mm thickness, drying and firing to cone 03. Then I dropped it on the floor. Why? I am looking at the angle of the breaks and the corners of the breaks. If these bodies were mismatched in firing shrinkage or thermal expansion the built-in stresses would have made it explode into many more pieces and the breaks would not have been 90 degrees and the layers would have separated at the corners. These fit together very well. The white is actually an engobe, but it behaves like a plastic clay when I dewater it.