Apatite

Description

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. Chemical Classification: Phosphate; Cleavage: Poor to indistinct; Streak: White; Luster: Vitreous to subresinous https://www.mindat.org/min-29229.html