
Topic
Free account · your comment posts right after signup
Bitter spar or bitter-spar (German: Bitterspat, Rautenspat) is a trivial, partly obsolete name for at least two carbonate minerals that are relatively similar in composition: dolomite (with varieties) and magnesite (with varieties). The name «bitterspar» was given primarily due to its content of magnesium carbonate, MgCO3, which is the basis for obtaining bitter (Epsom) salt or magnesia. There is also a popular belief that the name directly reflects the taste of the mineral: if you lick the crystals of this feldspar, they may seem bitter.