Due to its Hardness and Density dolomite is used for Building Stones, Products & Construction.
Dolomite is chiefly used as refractory, ramming, and fettling material in steel melting shop, and as fluxing material in blast furnace operation in secondary steel and ferromanganese manufacture.
In horticulture, dolomite and dolomite limestone are added to soils and soilless potting mixes to lower their acidity ("sweeten" them). Home and container gardening are common examples of this use.
Dolomite is also a good source of magnesium metal. The magnesium metal is extracted from dolomite by the well-known fero-silicon process.
It is also an important petroleum reservoir rock, and serves as the host rock for large strata-bound Mississippi Valley-Type (MVT) ore deposits of base metals (that is, readily oxidized metals) such as lead, zinc, and copper.
In nutrition, dolomite is sold sometimes as a dietary supplement on the assumption that it should make a good simultaneous source of the two important elemental nutrients calcium and magnesium. However, such dolomite supplements are from non-ore regions of the world before ingesting them.
Dolomite also finds use in the manufacture of mineral wool. It is used as an Ornamental stone and also as a raw material for the manufacture of cement.
To a lesser extent it is used in the glass industry especially in sheet-glass manufacture.