Dolomite is a completely natural calcium magnesium carbonate that occurs as a rock deposit.
Used in farming/orchard situations where both magnesium and lime are needed, dolomite can be an excellent alternative to applying these nutrients separately, saving both time and money.
The finely ground particles of Dolomite provide a higher availability of magnesium in comparison to magnesium oxide, and thus dolomite is often chosen as a source of magnesium independently of its liming value.