looks like plain ole base rock to me
Base rock is just live rock that isn't "alive" anymore. It originally came from somewhere but was left out of water over time and became base rock. I'm sticking with it originally came from Fiji but there is no way to be 100% sure.
So does that mean It will never become live again if I cycle it?
No it will just add a small piece of live rock and it will seed the dead rock and over time the rock you got will become live again
Yes just a small one though. That will give you coralline and pods and other little critters. Plus all the bacteria