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**Chemical composition:** Ca₅(PO₄)₃(F,Cl,OH)
**Hardness:** 5
**Density:** 3.16‒3.22 g/cm³
**Crystal system:** Hexagonal Dipyramidal
**Luster:** Glassy
**Info:** Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite with high concentrations of OH, F and Cl ions in the crystals. The primary use of apatite is in the manufacture of fertilizer and it is a source of phosphorus, phosphoric acid and hydrogen fluoride for chemical industry. Apatites are similarly as other phosphates used as a host materials for storage of nuclear waste. Hydroxylapatite is the major component of tooth enamel and bones.
## Keywords
mineral apatite texture color ornamental stone semi-precious gemstone