Bone Material is not an actual in-game-object but a generic term referring to one of the following 26 game-objects: Adder Skeleton Ant Chitin Bear Tooth (3) Billygoat Horn Boar Tusk (3) Bog Turtle Shell (3) Boreworm Beak (1) Cachalot Tooth (1) Cave Louse Chitin Crabshell (3) Flipper Bones (1) Lynx Claws (2) Mammoth Tusk (2) Mole's Pawbone Moose Antlers (2) Orca Tooth Red Deer Antlers (3) Reindeer Antlers (1) Troll Skull (1) Troll Tusks Trollbone (1) Walrus Tusk (1) Whale Bone Material (3) Wildgoat Horn Wishbone Wolf's Claw (1)
(n): (Superscript) Number of items in that generic type group.
(n): (Subscript) Number of crafts that specifically require this item, if any.
... Actually Bone Material is a general in-game-object. (same-name conflict)
How to Acquire
All animals contain Bone Material. Killing and butchering an animal will result in a quantity of bone material dependent on the type of animal see Creatures for more information.
Do note that animal specific materials such as Moose Antlers, Deer Antlers, Boar Tusks, Bear Teeth, Crab Shells, Bog Turtle Shells and Wishbones also count as Bone Material, so be careful when crafting with these items in your inventory