Dolomite crystals of trigonal system carbonate minerals. Chemical composition of CaMgCO32. Often with like iron, manganese and other qualitative generation of dolomite for magnesium. When the iron or manganese atomic number more than magnesium, known as the iron manganese dolomite or dolomite. Trigonal system, crystal rhombohedron, crystal bending into the saddle, often get piece of twin common. Usually a granular assembly. White is pure; When it is gray iron; After weathering are brown. Glass luster. Slow up the bubble in case of cold dilute hydrochloric acid. Is the main mineral composition of dolomite. Marine sedimentary origin of dolomite often associated with siderite, lime rock into each layer production. In the lacustrine sediments, dolomite, anhydrite and rock salt and gypsum, sylvine symbiosis, etc.
 
Dolomite after chemical processing to produce light calcium phosphate, calcium supplements taken internally, senior food industrial calcium additive, bulking agent and abrasive, feed additives, phosphates, and calcium lactate, calcium gluconate, calcium chloride, calcium carbide, etc., can be seen from the application of dolomite, all need through grinding mill after broking be made into powder and then applied to all walks of life, and the Clirik machinery produes the limestone mill powder machine, ultra fine mill equipment whose the main application object is dolomite, accompanied by  the dolomite fines are applicanted by more enterprises and industries.