I just received a cynarina coral (cat's eye, donut, etc) from liveaquaria diver's den. It wasn't obvious in the original photo but this thing has a huge 3-4in long skeleton! Is this normal? Is this even its skeleton or just debris or rock that it's attached to?

That definitely can't be buried in the 1 inch sandbed in my little tank and I doubt I'll love the look of it above the sand. Definitely resembles a petrified piece of poo to me, haha!
Is it safe to trim/saw off a portion of the bottom of the skeleton so that it can sit upright buried in the sand?
It's still acclimating now so I can take better pics later, but thought I'd go ahead and start trying to figure this out!

That definitely can't be buried in the 1 inch sandbed in my little tank and I doubt I'll love the look of it above the sand. Definitely resembles a petrified piece of poo to me, haha!
Is it safe to trim/saw off a portion of the bottom of the skeleton so that it can sit upright buried in the sand?
It's still acclimating now so I can take better pics later, but thought I'd go ahead and start trying to figure this out!