A handful of the BO2's used for Ellador have diamond ore or blocks in them. It's sad, because you run across random holes dug in the ice surface where people have dug into the surface terrain. Hopefully it's a lesson to world builders to not do that in the future. Now they can't even easily regen the damage because the diamond blocks will reappear and the terrain griefing will be repeated.

 

It's really too bad, because the ice oceans in Ellador look great!

 

On the plus side, did you backfill the ice and snow you dug up to get to all the diamonds, so there wasn't an ugly hole and/or water flows? Then it really wouldn't be too bad and the terrain would be intact.

 

On the plus side, months of an area not being completely riddled with terrain damage on a high-activity server is a pretty good achievement!