I have been working with similar stabilized Kingman for a few years now. In my experience you want to avoid rough that has large pockets of translucent epoxy. Cabs cut from this will have blue floating in the epoxy and it looks bad. Stabilized is good but some rough should be avoided IMO.
Here is a cab I cut last year as an example of nice stabilized that comes from a similar pocket.
Notice that the cream colored matrix is not translucent epoxy.