What is this on my live rock?

[elchopo]

I cant even really describe it so here is a picture. Any idea of what it is?

 

[attiland]

I cant even really describe it so here is a picture. Any idea of what it is?

Now this is a good one but I have no idea. Looks a bit like GSP but it is not GSP

 

[Midrats]

Briarium perhaps?

 

[JGT]

Looks like what is called metallic GSP. I believe Briarium is the correct genus mentioned above. It's actually a form of an encrusting gorgonia.