| APATITE CRYSTALS ON CALCITE |
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| Name | Apatite |
| Formula | Ca5(PO4)3(OH,F,Cl) |
| Hardness (Mohs) | 5 |
| Density | 3.10-3.35 |
| Crystal System | Hexagonal |
| Colour | Commonly blue-green, green grey, yellow |
| Lustre | Vitreous, greasy lustre |
| Associated minerals | Aquamarine, smoky quartz, amethyst |
| Comment | Phosphates are used in the manufacture of fertilisers. |
| Overall size of crystals | 4- 8 millimetres. |
| Location | Wilberforce, Ontario, Canada |
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