GEOLOGY & PLANETARY SCIENCE A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site dolomite A carbonate mineral consisting of a mixed calcium-magnesium carbonate, CaCO3.MgCO3, crystallizing in the rhombohedral system. It is usually white or colorless. The term is also used to denote a rock with a high ratio of magnesium to calcium carbonate. Dolomite is often found associated with limestone or marble and in magnesium-rich metamorphic rocks. Dolomitic limestone is a rock in which the limestone has been partially replaced by dolomite. Dolomite is used as an ornamental and building stone, and is a source of magnesium. Hardness 3.5–4, relative density 2.8. Related category    • GEOLOGY AND PLANETARY SCIENCE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP