Difference between Dolerite and Dolomite

What is the difference between Dolerite and Dolomite?

Dolerite as a noun is a fine-grained basaltic rock while Dolomite as a noun is a saline evaporite consisting of a mixed calcium and magnesium carbonate, with the chemical formula camg(co3)2; it also exists as the rock dolostone.

We hope you now know whether to use Dolerite or Dolomite in your sentence.