Good luck!we don't have a runnings here but maybe i can find another company that handles a black diamond and check it out, seems to me that i did see that name somewhere when we were out yesterday, maybe rural king
i would think that they're both the same, i know the white ash is used to make baseball bats, its a very hard wood, and very hard to cut, my husband dulls a blade every time he cuts and then has to sharpen it again before he can cut again( usually he can cut for about three hours if that )