Gres 10000 to 9268 -- 9355 Glass ---- to 8710 -- 8352 Lead ---- to 8571 -- 7931 Tin ---- to 1095 -- 7931 Stone soft ---- to 8000 -- 8095 Clay ---- to 6190 -- 6897 Oker ---- to 4762 -- 5517 Wood ---- to 2195 -- 4516