What type of ions and proteins make up the majority of bone?

The majority of bone is primarily composed of hydroxyapatite, a mineral that is mainly made up of calcium and phosphate ions. In addition to these minerals, bone contains a significant amount of collagen, which is a type of protein that provides structural support and flexibility. Other proteins, such as osteocalcin and osteopontin, are also present and play roles in bone formation and mineralization. Together, these components give bone its strength and resilience.