Apatite is the name of a group of phosphate minerals with similar chemical compositions and physical properties.
They are an important constituent of phosphorite, a rock mined for its phosphorus content and used to make fertilizers, acids, and chemicals.
Apatite has a relatively consistent hardness and serves as the index mineral for a hardness of five in the Mohs Hardness Scale.
Sizes:
23 -33*20*6mm,
24 -29*24*6mm,
25 -43*25*7mm,
26 -28*21*6mm
27-
28-