Whale teeth as handles or mace heads?

[Atlantia]

Strange discussion with another collector about materials used for handles on various weapons. I was saying I like stone and metal, but we got round to discussing 'unusual' substances used for handles and he said he seemed to remember many years ago seeing a big dagger with a whale tooth for a handle.
I can't think of any examples of this that I've seen, but thinking about it I started wondering if Sperm whale teeth had ever been used as mace heads (being incredibly hard, and heavy and 'stubby').
Sorry for the macarbre subject!