Ivorite

Ivorite is one of the natural metals of the thirty Arthosian metals. Famously, it is made from bones, even if the bones are still alive. Ivorite is harder and stronger than bone, so some warriors will willingly undergo a magical procedure to turn their bones into Ivorite. These warriors have many nicknames, such as "stonebones", and are easy to spot because of the telltale scars from the procedure. Ivorite can create blood and function the exact same way as living bone, making it one of the most curious of the Arthosian metals.