Phosphorite is a sedimentary rock. By composition, more than 50% of phosphorites consist of phosphate minerals, mainly from apatite, more precisely, from fluorapatite. It is a valuable raw material for the production of mineral fertilizers. Phosphorites occur in various forms of excretions, including in the form of nodules.
You can see phosphorite stone for sale and buy it in the Minerals of Russia online store.