Buried in the ground in treasure chests will be all kinds of trophies. Below, you can find all the potential loot and chances to find it.

As you can see, you have a good chance of finding each treasure. If you're playing with other people on a server, it might be hard to tell if the box is being looted. Fortunately, every buried treasure has a heart of the sea. Which means if it's gone, it means someone has already robbed the case.