The process whereby a chondroblast acquires specialized structural and/or functional features of a chondrocyte. A chondrocyte is a polymorphic cell that forms cartilage [goid 2062] [evidence IEA]; The process whose specific outcome is the progression of an osteoblast over time, from its formation to the mature structure. Osteoblast development does not include the steps involved in committing a cranial neural crest cell or an osteoprogenitor cell to an osteoblast fate. An osteoblast is a cell that gives rise to bone [goid 2076] [evidence IEA]; The regulation of the levels, transport, and metabolism of calcium ions within a cell or between a cell and its external environment [goid 6874] [evidence IEA]; The cascade of processes by which a signal interacts with a receptor, causing a change in the level or activity of a second messenger or other downstream target, and ultimately effecting a change in the functioning of the cell [goid 7165] [evidence IEA]; The series of molecular signals generated as a consequence of a G-protein coupled receptor binding to its physiological ligand, followed by activation of adenylyl cyclase and a subsequent increase in the concentration of cyclic AMP [goid 7189] [evidence IEA]; The series of molecular signals generated as a consequence of a G-protein coupled receptor binding to its physiological ligand, followed by the activation of phospholipase C and the subsequent release of inositol trisphosphate [goid 7200] [evidence IEA]; Any process that activates or increases the rate or extent of cell proliferation [goid 8284] [evidence IEA]; Any process that stops, prevents or reduces the rate or extent of cell proliferation [goid 8285] [evidence IEA]; The deposition of calcium phosphate in bone tissue [goid 30282] [evidence IEA]; The process by which specialized cells known as osteoclasts degrade the organic and inorganic portions of bone, and endocytose and transport the degradation products [goid 45453] [evidence IEA]; A developmental process, independent of morphogenetic (shape) change, that is required for a cell to attain its fully functional state [goid 48469] [evidence IEA]