Although it might seem counter intuitive, Fossil Ivory (I assume that's what you talking about) has it's own unique characteristics. It is affected adversely from heat, the thinner the scales, the worse it is. Even warm to the touch while grinding can cause scales to warp. It must be ground SLOWLY, and if is gets warm, you must lay it aside and let it cool naturally to room temp in order to prevent problems. It will also "move" with humidity changes, and that issue becomes very obvious AFTER the scales are on the knife. Another annoying issue is that when you drill it, it will often "chip" where the drill bit exits....the best way I have found to combat this is to tape the exit side with masking tape, but even then the chips will still sometimes occur. The keys are to work it slow and easy. The material itself is expensive enough, but the difficulty in working it is another reason that knives with this material tend to cost so much. There's no way I could accurately described all the issues that can occur with it...each piece or set of scales present their own unique challenges. Over the years I have learned, though hard experience, that it's not a matter of IF you will wreck a piece or set of scales, it WHEN. I've come to realize that it's just part of using Fossil Ivories.