Its purdy for sure.

From putting the rock in fresh and setting it in the sun you are going to have some die off,it depends how big the rock is.

Personally I don't put any dead objects in my tank.

Your dry rock will need curing.
Depending on the size of the rock and your systems water volume you might be ok to place it directly in the display or best into your sump for 10 days then in the display.
if your system is small to the rock size I would do a full curing in a bucket for 2 weeks.

The rock is about 5lbs. It's now in my sump I guess I'll keep it there for another week

+1

looks like a freakin giant colony for German Blue digi

Great find!

Yup it sure is =). I made a bunch of frags. They will be posted for sale soon along with other amazing sps =P