Yes, I have done a few with ivory, both ancient and fresh.

The rule for ivory is not if it will crack, but when will it crack. A lot of the ancient stuff already has
cracks and layer separations and outcome can be questionable.

What you got and what you looking for????
Thanks
Tim

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
Albert Einstein

At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".