Phosphate stone

Phosphate stone (from Latin - concrementum, phosphorus stone; from Latin, concrescere to grow, grow, build up). Used to designate various sedimentary formations that are of great importance in petrography as minerals. It consists of calcium phosphate and can be found inside blood vessels. Among other deposits of phosphate stones, the most interesting are those found in the veins and vessels of mammals.

In nature, bone and horn stones form on the bottom of the lake as a result of the adhesion of elements of underwater soil containing calcium. Concretions of crustal origin, depending on the conditions of the marine environment, are formed either on the bottom surface at the site of sedimentation