tightening widespread valve bodies on granite

hi

i tightened down some valves on the granite vanity top, i made them pretty tight, but if try to move them they can move though it takes some forcing

how tight can i make them on granite? can i tighten them super tight with no worry of cracking the granite??

i'm paranoid because i broke a toilet in the past making stuff super tight....i know thats much weaker than the granite but just want to be sure

Is it metal on stone with plumber's putty or rubber gaskets? The last fixture I mounted on granite I made the mistake of using plumber's putty and it stained. I caught it in time and removed the putty, got rid of the stain and made my own gaskets from thin EPDM rubber. I used big fat O-rings in place of the putty to fill the gap around the inside of the hole.

I doubt you can break the granite by over tightening it. You are more likely to break the fixture.

Stone is pretty tough. I've never heard of anyone being able to break the stone.

they have gaskets......maybe i'll just leave it as is for now and see if i experience any movement with everyday use