The primary mineral found in bones is hydroxyapatite, which is a form of calcium phosphate. This mineral gives bones their strength and rigidity, allowing them to support the weight of the body and protect vital organs. Hydroxyapatite crystals are embedded in a matrix of collagen fibers, contributing to bone's resilience and structural integrity. The mineral content of bones also plays a crucial role in the body's calcium and phosphate homeostasis, making bones not just structural elements but also important for metabolic functions.