rob p
I have a similar supply of ancient ivory in various degrees of splits, cracks, and other deterioration. I have been "keeping" it in a large storage plastic clothes storage container near up on a shelf near the heat vent in the basement. When I pick a piece to use, I soak it in some wood stabilizer I get here in MI. It is runny and not a filler, but it seems to do a fair job of locking in the ivory from any futher splits and cracks. I fill the cracks with 2 part epoxy before the stabilizer.
Actually I am soaking ALL organic handle material I use in this stuff now.
Yes, that is one really nice knife shown above.
jmho
Tim