As to what kind of wood this is. I know but I've never heard of it being used for scales but I'll see how it turns out after being stabilized and filled.

We need a hint.
Did you order it or cut it off your new place?

My first thought is pecan

Just a guess olive.

Cut it off of the new place but it's not pecan or olive.

I've got some chunks of spalted elm that look like that; but it's really hard to tell unless you can smell it, feel it, and study it real closely with an adult beverage sitting beside you at the work bench.

OK one last guess, then I let someone else try, Persimmon.

Getting closer

Bois d'arc?

My last guess is pear

Rookie guess. It aint black walnut is it? Too light?

We have a correct answer but I think Dink may have had a little inside knowledge.
It's from a partially spalted root of a Kieffer pear tree.

This ought to be interesting. Can't wait to see the finished product.