Yes, that looks like a pile of Red Ravens. That's the most I've seen at once. Green and blue ravens are much more common than red ones. Nice and minty green and blue ones can go for around $30 apiece, reds should fetch more but I rarely see one for sale, so I have little idea on value.
You did show several seams in those other pics... looks like all of them except the red and white one... that isn't the seam. It could be hard to see on that marble. Usually you can see where the color got pinched or manipulated by the shear on the marble machine.