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Dolomite is a common sedimentary rock-forming mineral that can be found in massive beds several hundred feet thick. They are found all over the world and are quite common in sedimentary rock sequences. They are sometimes referred to as dolomitic limestone. Dolomite occurs in crystals and in masses and forms rhombohedrons as its typical crystal habit. This mineral was named for the French mineralogist Déodat de Dolomieu (1750-1801), who first described it in 1791.
CaMg(CO3)2 - Calcium Magnesium Carbonate
Class:
Group:
Dolomite
Gray-white, pink, red, green, brown, black
White
Vitreous to pearly
Transparent to Translucent
2.9
3.5
Perfect
Conchoidal
Rhombohedral crystals, massive
Non-fluorescent
Frequency:
Common
Origin:
Magmatic in pegmatites, hydrothermal, metasomatic, sedimentary and metamorphic, together with siderite, magnesite, calcite and other minerals.
Occurence:
Brumado, Bahia, Brazil; Corydon, Indiana, USA; St. Clothilde, Quebec, Canada; Eugui, Spain; Binntal, Switzerland.
Application:
Used in certain cements, as a source of magnesium and as a mineral specimen.

 
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