Calcium apatite is a naturally occurring mineral form of calcium phosphate, commonly found in various biological and geological settings. It is a key component of bone and tooth structure in humans and many animals, providing strength and stability. The chemical formula for calcium apatite is often represented as Ca5(PO4)3(OH), indicating its composition of calcium, phosphate, and hydroxide ions. In addition to its biological significance, calcium apatite is also used in various industrial applications, including the production of fertilizers and ceramics. Its ability to absorb and release nutrients makes it valuable in agriculture. Furthermore, researchers study calcium apatite for its potential in biomaterials and bone regeneration therapies.