I think you're doing remarkable work for having just started. My favorite in this group is the blue and green one, for sure. And I definitely see the snake head on that last one.
Alley definitely wouldn't shock me. And just FYI, the term "diaper fold" is usually associated with a specific type of fold found on CAC marbles. Check this post for a good example.
If you consider your first pic the top of the mib, I think a pic of the front (the side facing the bottom of that pic) would go a long way toward a correct ID.
Here is a 1 1/8" (not including the little nub) sextuple ingot. It's Bill's marble now.
It takes some effort to see all six of the 5/8" marbles, but the volume calculation is spot on too.
I don't recognize this one either. Might be a newer JABO run. If it's vintage, my guess would be Heaton but . . .?
Did you notice the little fracture in the green striping?