help with coral I.D

[Beemo]

bought this today, sign just said assorted mushroom rocks. they had so many varieties. first guess was a rhodactis but now im wondering if its a umbrella mushroom. it has tons of nubby's similiar to ricordia but several of the nubby's look like stars instead of round and pearly. anyone have a good guess? i ruled out ricordia right away
http://i2.photobucket.com/albums/y16/ewyourpoor/000_0395.jpg

[MyMonkey]

Hmmm. Nice looking shrooms. Maybe a green Rhodactis. Discosoma neglecta or umbrella mushrooms are generally more uniform and thicker I think. Not certain though.