Here is something to think about , drift wood.....
1) it came from the earth = one element
2) if it fell in to the sea because of a fire = second element ....if not you can dry it over fire
3) water , sea or lake , river , pond etc. = third element
4) carried to where you found it by the action of air = fourth element
Think that would make one find wand for all occasion ?. An the shape of some of the roots are just beautiful .