It's totally actual dragon bones. And dragon skin, for the leather. And dragon wing webbing, anywhere there's any cloth.

She does pretty good in a fire.

Alleyana grunts a confirmation at that, and focuses on shoving Jethro off with her bar-arm when the undead horse starts trying to 'sniff' at pockets she doesn't even have. Look, buddy, you don't even eat, treats or otherwise, why would she be carrying anything--

"He's supposedly possessed by a spirit of Freedom. Means lots of running. And being a prat, apparently."

But she's not going to keep the human waiting, that's just a comment for the sake of it.