For the last group, I'm not sure. For ID's, it's helpful to show clear views of the seams or cutlines. In your third photo, the middle marble shows a clear cutline. In your second photo, the second marble from the left is also an example of showing the cutline. I can also see a couple of cutlines featured prominently in the first picture (marble # and marble #5 show cutlines front and center).
That's what I need to see for the fourth group.