Well, My LFS had used Holy Rock at one time to display coral colonies. They redid their coral tanks and put the holy rock in their "live rock" tubs. So I guess to answer your question, Yes, I believe you can.
It's your white rock that has holes throughout. You see some in Freshwater tanks. That's just the name I was told that it's called there might be another name for it. Just checking to see if it could be put into a saltwater tank.