Dried/Dead or Lace rock--- As long as it is Porous and lightweight will/should work well.
All "live rock" Has Living bacteria inside and outside of it. Also Many Times Coraline algae.
Sometimes Micro Algae's Small bits of coral . Sometimes Unwanted pests and Aptasia etc
This bacteria grows and multiplies and changes to the point where it can break down the fish waste and is a living Filteration system/Colony of bacteria.This will take a few days to a few months. It is called a Nitrogen Cycle !
This bacteria will grow in a tank naturally and grow inside the dead bacteria free rock and in time become live rock in this way!
From a looks standpoint it should in time get coraline algae( Mainly Purple and sometimes Red and other shades) which can form everywhere eventually.
Some people will get another person who lives close to them and has an established (older than 7 Months) Tank to save, say a bucket full of there water or more from a water change.
Have them scrape some of the corraline algae from there glass off and siphon it out of there tank into the buckets of water.
Then you can use this to start your cycle and also to seed the tank with coraline algae!
So Yes you can use it but it will Take a bit longer For the nitrogen cycle to complete itself !
If there is no Older tanks nearbye to use then you could also just Buy a piece or two of Live rock and add it to the pile of Dried/Dead/Lace rock and it will seed all the other rock with all of it's Bacteria !!
Paul