Well Ray the place that gets the stuff for Jantz does mention that zebra is fossilized, but also does say some other species are stabilized. I guess it should be ok. I can soak the marrow with some thin CA if needed, I have access to a low pressure tank, only about 120 lbs. but that's fine.
https://www.giraffebone.com/zebra-bone.html
As a side story, Pop's of Pop's Knife Supply told me his camel bone is probably water buffalo bone because the guy who sells it to him is a miserable cheat.LOL Made me laugh, he used a little more colorful language than that, but you certainly can't tell the difference between the camel bone or buffalo bone, both dense.