We have variable building materials for stone, wood, metal, cloth, why not bone?
Regular bones - current bone color and texture.
Troll bones - troll bone color and texture.
Mammoth tusks - extremely white.
Antlers - darker than regular with that preserved antler texture.
Small bone (claw, tooth, wishbone) - texture of a tiny assortment of bone.
Edit: Also pave with bone, though I'm sure this has been suggested before.