Board Thread:General Discussion/@comment-5625000-20131110042231/@comment-4326839-20140101022428

I think,my option,in survival 303,coal is harder to mine then iron.As it require to make steel.

I think copper and tin mining chance should be a little more(about 5%)

and Stone Pickaxe Mining Copper And Tin Success Chance should be good.No one want to waste time to craft bronze if they can mine iron at almost similar chance.(if not,Crafting bronze should train you either smithing or chem.)

They also need to be common,otherwise if they only can find iron they can't really mining iron(the chance is low)