Dry ancient Florida reef rock

[ryshark]

Is it normal to have unknown things in the rock? I haven’t noticed it in other dry rock Ancient reef rock I bought in the past, but this piece has something in it. My concern would be a heavy metal. I’m probably just being paranoid because this is a reboot and I don’t want to start out from the get go with an issue. You can kind of see what I’m talking about in the pictures

 

[ryshark]

It’s not just discoloration, its actually something in the rock. Looks like a gray small rock or metal in the reef rock. I’m tempted to take that entire rock out of my tank, unfortunately it’s the biggest one that came in the shipment.

 

[Cory]

Try and break it off some way

 

[Fish_N_A_Box]

Pull it from the tank... use a drill and a small masonary bit and create a fault line .. hit it with a hammer and break that section off if worried.