The bone matrix has the following crystals
The bone is made up of bone cells and extracellular matrix.The matrix consists oftwo types of materials,organic and inorganic. The organic matrix is formed by the collagen,which forms 30-35% of dry weight of a bone. The inorganic matrix is primarily calcium and phophorus salts,especially hydroxyapatite .It constitutes about 65-70% of dry weight of a bone. ref:maheswari,5th edition page no.9
Calcium hydroxyapatite
Calcium pyrophosphate
Calcium phosphate
Calcium sulphate
Anatomy and physiology of bone and fracture healing