Board Thread:Introductions/@comment-82.46.142.194-20130429195652/@comment-4062229-20130523043530

I'll say there are 3 possibilities:

1) There is a Petrosapien-eater who can also eat Chroamastone and Sugilite.

2) Like the last one; with only the difference that  Chroamastone and Sugilite can beat it.

and

3) There isn't a predator for Crystalsapiens.