As a longtime wood worker familiar with exotic woods:
It would appear to be claro walnut, and the part known as a crotch, or possibly a stump. Crotch is where a branch joins the main trunk, and results in some wild figure.
Stump is where the bottom of the stump meets the roots underground, this creates the eye figure you see.
It could also be a walnut Burl which would also have the lighter whorls and the eyes.
I would say though that it is walnut.