This is an interesting bowl, and was our first foray into a technique known as shou sugi ban. That's Japanese for "burned cedar plank". Despite the translation it's often applied to non-Cedar woods, like what you see here.
Sitting on top of a solid oak base, the rings are segmented maple with the shou sugi ban technique applied on the exterior. The interior remains natural with a protective finish.
This is a pretty heavy bowl to keep your project yarn on top of your desk or side table. And if Miffy the Destructive Tabby Cat knocks it off the table, it probably won't even show any serious damage. Probably.
The base is a "muted" margarita style (thicker "stem" than usual). .