Can you post a picture?
If it is real fine, green, and hairy looking then that is not good.
Kinda like Troll Hair, if you are old enough to know what a Troll doll looks like.
That would be Green Hair Algea and it is not desireable.
It really doesn't matter, because you are going to want to scrub off whatever is growing on it prior to putting it into the tank anyways. Here is a threa on the curing process: Live Rock
It Is In My Tank {just Starting} It Was Cured {from A Running Tank} I Just Noticed Lil Tiny Zoas And Another Plant Can't Remember The Name. So Maybe Thing Are Coming Out Of Rock?
i have the same thing, tank has been cycling for 7 days now, i have starfish, pods and bristleworms munching it. all my water parameters are stable so i may introduce a few clean-up guys to help. i think its normal. it means theres life.
That Is Kind Of What I Was Thinking Because I Got The Lr From A Tank That Was Setup And Running For Awhile Drove 7 Hours With {well Packed In Water And Wet Towels} Put It In My Already Running Tank And A Week Later All This Stuff Starts Up.