How do you shift a large, well-glued cracked marble tile?

[ChrisKingston]

I put a hairline crack in a tile putting it on. Wish I'd just whipped it off when I could but I didn't. Followed the advice and drilled a hole centrally hoping I could chip off outdated but with normal bolster it's not going anywhere. Getting tiny chips been if I'm giving it some real welly. What can I do to shift the tile? Thought getting the adhesive off the Aquapanel would be the tough part but can't even see how I'll shift the tile.

I'm reluctant to keep hitting the wall too hard as it's bound to weaken the wall a bit. My only other idea is to go at it very gingerly with an angle grinder. Any better ideas or tools? Should I try to get a diamond disc for the angle grinder or will a normal stone one do?

The tiles are 305 x 457 x 12mm held on with Keraquick with Latex Plus on to 12.5mm Aquapanel.

I know whole thing is a bit of a cock up but I've started now... I'd really appreciate any help though, really keen to get this sorted.

 

[Burnerman]

Avoid jarring the wall with repeated hammer blows - it could well come back to haunt you.....
I'd cut along the grout line with a 1mm slitting disc in an angle grinder, and this should prevent damage to neighbouring tiles.
I'd then use a diamond disc cutter to slice through the tile at random.....cut through the tile but not into the Aquapanel, then use a sharp bolster chisel to remove what you can.
Dusty and messy I'm afraid, but it does show how good the adhesive is!
John