Antler is one of natures only materials (and best, imo) that is designed & evolved specifically for impact. Ivory is not. You'll be hard pressed to break or even crack an antler ferrule by playing pool. If two 250lb. deer can charge toward one another & collide head on without breaking antler, you aren't gonna do it by hitting a billiard ball. Not only does it have incredible impact resistance, but has high sheer strength, too. Deer lock antlers & twist & turn & drag one another around, without the antlers breaking. They polish the antler by shredding small trees with them. Pretty incredible stuff.