Dolomite is a type of limestone. Dolomite limestone, another ground-limestone product, comes from ground rock containing calcium-magnesium carbonate (CaMg[CO3]2) and has a higher neutralizing value that calcitic limestone. Dolomitic limestone not only lowers pH but also can supply magnesium in soils that are deficient.

In addition, a number of applications exploit dolomite uses as a source of magnesium, for example glass and ceramics manufacture, a sintering agent in iron ore pelletization or as a flux agents in steel making. In agriculture, dolomite uses serve for pH control, while the chemical industry uses the mineral in making magnesium salts, including magnesia, magnesium oxide (MgO), which is used in pharmaceuticals.

It is rich in magnesium (MGO 22 % ++) and calcium carbonate, and has smaller amounts of several other minerals.

Ground Magnesium limestone (GML) (MGO 18 % ++) is used as a soil conditioner; it corrects acidity, supplies calcium and magnesium to plant roots, and increases bacterial activity in the soil.

Typical Chemical Properties
  Dolomite GML
CALCIUM CARBONATE (CaCO3) 54% 38%
MAGNESIUM OXIDE (MgO) 22% 18%
CALCIUM OXIDE (CaO) 30% 30%
ELEMENTAL CALCIUM 22% 22%
MAGNESIUM CARBONATE (MgCO3) 44% 44%
ELEMENTAL MAGNESIUM 12% 12%
APPEARANCE White-Greyish Powder White-Greyish Powder

Types of Packing
  • 25kg palletized bag
  • 50kg palletized bag
  • 1 metric tonne bag


Product Disclaimer:
We strongly believe that the abovementioned test report is truthful and accurate, yet, it is purely a guidelines in the use of our products and no guarantee of its accuracy is made neither can we cover every possible application of our products nor can we anticipate every variation encountered in manufacturing equipment and methods. Hence, it is strongly advisable that all user of our product to conduct their own test to determine the suitability of such products for their particular purpose. In no event shall HardRock Calcium, be liable for direct, indirect, incidental, special, exemplary, punitive, or consequential damages of any nature.
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