This is spalted shagbark hickory, a wood I'd never even heard of before. The tree looks awesome from pictures online.
This bowl is about 7.5" by 2.75 inches. It was supposed to be a full 8 inches diameter, but I confess the hole I drilled for the screw chuck somehow managed to be slightly off center...
Comments definitely welcome. Hah, well, sideways is better than nothin'! (Adding pictures from an ipad isn't so easy!)