Pair of scales of bull horn.
Bull Horn, is used in cutlery to manufacture of handles of knives and pocket knives. Handles guns and other weapons.
Unpolished homogeneous material and non-porous, it reaches a very fine and bright polished. The colors vary from white to black, or with streaks of both colors. Non-uniform thickness, may have concavity.
Very easy to work, you get a spectacular finish, with basic hand tools.
In case of non-manual tools, recommended work at low RPM, or may not work the same area consistently, avoiding raising the temperature of the zone, because abrasions occur in the material by the excess temperature.