We found a box of about 100 ~ 3″ x 3~1/4″ square brown tiles in a New England barn. These have a curved cut-out on the back. These have been tested and are likely bakelite (simichrome test done). These have a marble effect and may have been used with furniture or construction (like a chair rail section. We are looking for someone that may know about them. Someone suggested a base for a trophy or small lamp.