An experiment gone wrong??? Maybe not. I tried using a cookie cutter I thought was stainless steel for a dam but as you can see it was not. It was tin coated. Fortunetly I lined the inside edge with kiln paper so the glass actually turnd out OK all the tin coating burned off cleanly so maybe if I kiln wash it and lined it I could use it again. Would the steel give off dangerous fumes? I don’t know. Guess I better check into that. Here is the photo of the heart. It is about 5” and made from scrap glass.