No you or fine to me that is the best way to set up a new tank.....
your uncured rock will give you the cycle you need to get your
bacteria growing.
You will have about 6 weeks before you can add fish or whit ever
just get some test kits and watch your Ammonia-Nitrite and nitrate
ones all is in line you will be Reade to go.

The only other thing is when the other rock comes in just rinse it good before you but it in