Apatite 

Apatite is a mineral that forms the basis for a group of minerals namely Flourapatite, Mimetite, Pyromorphite and Vanadinite. There are 19 different species in the group.  Apatite can be found in a wide variety of colours depending on which sub category it is found in.

 

Apatite can be found in South Africa, Namibia, Zimbabwe, Botswana and Swaziland.

Chemical Formular :  Ca5(PO4)3(OH,F,Cl)
Refractive Index :      1.63-1.64
Hardness :                  5  on the Mohs Scale
Crystal System :        Hexagonal