It's always fun to use a personal piece of wood. My favorite, and I know I've recounted it here before, is wood from a poplar tree. The wood wasn't really that exciting looking figure-wise, but the tree was one the guy used to climb as a boy, and it was cut down when a freeway bypass was being constructed and he acquired the lumber.
Bob has confirmed that your Redwood Burl will work just fine for a Skylark top!