Abstract: In this study, the magnesites of Konya region were investigated as geological,mineralogical and geochemical and accordingto this, origines and foundation conditions of the magnesites were defined. The magnesites, which are found as a result of alteration of the Upper Cretaceous serpentinites, have a cryptocrystalline texture. Magnesites are classified as primary and secondary which cut across the primary ones. While primary magnesites are harder with concoidal fracturing, secondary magnesites are softer due to the absence of silica. The formation of magnesites commenced with the emplacement of the ophiolites(Upper Cretaceous) in the region and is also continuing today. The thrusting of ophiolites over the carbonate rocks caused a temperature increase and this event led to the seperation of CO². Besides this, CO²- bearing waters of hydrotermal origin are alsoeffective in magnesite formation. These CO² -bearing waters, circulating upwards along the fractures within the serpentinites,alter the serpentinites and mobilise Mg²+ ion. During this circulation CO² and Mg2+ ion are combined and precipitated in smallfractures as stockwork ores.