"Collectable" is a personal preference. You will find many of these all in the same place.
That particular area is very common and easy to find. Die crack collectors might pay a small premium for spectacular cracks, but not usually on ones they can find roll searching themselves.
I keep a couple for cool factor, but would rather trade the rest in for another "lottery ticket".
Keep an eye out for cracks coming off the tops of both sides of the memorial that make it look like a porch swing!
And another with cracks coming off all 4 corners, those are pretty cool, too.