Dolomite
![](/Images/godic/202501/09/Dolomite-Magnésite-_Navarre5658.jpg")
![Dolomite](/Images/godic/202501/09/Dolomit,_Rumunia;_pseudomorfoza_po_kalcycie5658.jpg")
![Dolomite with chalcopyrite from the Tri-state district, Cherokee County, Kansas (size: 11.4×7.2×4.6 cm)](/Images/godic/202501/09/Chalcopyrite-Dolomite-444275658.jpg")
Dolomite /ˈdɒləmaɪt/ is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The word dolomite is also used to describe the sedimentary carbonate rock, which is composed predominantly of the mineral dolomite (also known as dolostone).