What type of Coral is this?

[Seamazter]

Its a common coral, you would do better to cut a 1 inch ring off the outside of the toadstool, then attach it with some plastic toothpicks and elastics to a small peice of live rock.
They are almost industructiabe make each peice about 1-2 inch sqaure and you should end up with alot of 10$ frags.