Bone (element)

Bone is a rigid, brittle organic material composed almost entirely of calcium, with other trace constituents. It is a strong and slightly elastic material which fractures under high pressure. Bone is the most common of the primordial death elements. It is the main elemental ingredient of milk, the second constituent being Juice.

Chemical properties

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Bone element entities

All skeletal beings are composed mostly or entirely of bone.

All vertebrates, like Humans, use bone for their internal structure. Their main component by mass however is Meat (or, rarely, some other element), so they don't classify as skeletal.