be carved in stone

To be made permanent, typically of a plan or idea. We might get brunch next weekend, but nothing is carved in stone yet.

be carved/set in stone

if an arrangement, a plan, or a rule is set in stone, it is completely fixed so that it cannot be changed (usually negative) The rules aren't set in stone; they can be altered to suit changing circumstances. These are just a few ideas to be discussed - nothing is carved in stone.

Common Names:

Name	Pronounced	Usage
Hartley	['ha:tli]
Vittorino	-	Italian
Miela	mee-E-lah	Esperanto
ErnŐ	-	Hungarian
Nevaeh	ni-VAY-ə	English (Modern)
Joos	YO:S	Dutch