What kind of coral is on my liverock?

[TriggerHappy]

I just bought some live rock from the lfs, just over 3lbs to test it out in my system until I get more. Anyway, there are two live corals on the rock. They are purple in color with green tips. Anyone know what kind these are and if in fact they are coral? I'm pretty new to LR, I'll try to get a pic up of this.

 

[reefrunner69]

Please post the pic, it is difficult to ID without one and I can think of several things that it could be, but probably isn't any of them, LOL.