Not all ivory will show a definite grain. Some is just as clean looking as plastic. The closer you get to the outside of the tusk, the more grain there is. You can always give the ferrule, the hot needle test. When you cut Ivory, it has a smell like burnt hair. If you've ever gotten too close to the grill with your arm, you will know that smell. So, hold a needle with a plyers & heat it red hot. Push it into the ferrule & smell the smoke. It will either smell like burnt hair or plastic burning...JER