What happens to a bone when it is burnt?

When a bone is burnt, it undergoes chemical changes due to exposure to high temperatures, typically losing its organic components, such as collagen, through combustion. The remaining inorganic material, primarily calcium phosphate, becomes more brittle and can turn to ash or powder, losing its structural integrity. The bone's color changes, often resulting in a white or grey appearance due to the calcination process. Overall, the physical and mechanical properties of the bone are significantly altered.