Skull Jewelry

In Melbourne, Australia a few weeks ago, I happened upon this piece in a shop window.
No idea what is going on here.
Apparently an actual animal skull of some sort, about the size of a dog (or a Dingo?) fitted with an elaborate piece of metalwork. The stone looks to be a huge Labradorite I think.
(Australia is known for their opals.....they were everywhere in shops, and not cheap, I might add.)
Interesting...but what would you do with it?