Its the handle, which is basically non bending. It cracked at the fade where the rings change.
I accidently split an osage stave in a similar manner when I was rough shaping it. I pealed up the broken handle part, glued it back on. And its been shooting strong ever since. But that was osage and was twice as wide at the fade (pyramid).
If it in the limb I would have thrown it down in a fit of anger and hit the heavy bag for awhile by now. But its not in a high stress part of the bow, its just cause I was bending it the otheway to add setback.
If I set it down long enough, I'll be able to cope with the loss. But I'd like to review all of my options of reviving it first.