| 1. | Apatite is a mineral that is often mistaken for other minerals.
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| 2. | Apatite is the defining mineral for 5 on the Mohs scale.
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| 3. | Apatite, ilmenite, magnetite and zircon can also be found.
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| 4. | Perovskite, apatite, nepheline and garnet may also be present.
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| 5. | Its hardness is 4.5, between fluorite and apatite.
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| 6. | Fluoridated water allows exchange in the hydroxyl groups in apatite.
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| 7. | Associated minerals include zircon, aegirine, apatite, perovskite and columbite.
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| 8. | Alforsite is a constituent of the apatite group of minerals.
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| 9. | Apatite, zircon and magnetite are practically always present as accessory minerals.
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| 10. | The accessory minerals are magnetite, ilmenite, apatite, and titanite.
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