Dolomite

CaMg(CO3)2

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A calcium magnesium carbonate (CaMg(CO3)2), dolomite lends its name to the rock dolostone that it composes. It crystallizes in the trigonal system, and its rhombohedral crystals often develop curved, saddle-shaped faces that are diagnostic. The mineral is transparent to translucent with a vitreous luster, a white streak, and perfect rhombohedral cleavage; colors include colorless, white, pink, gray, and brown. Its Mohs hardness ranges from 3.5 to 4 and its specific gravity from 2.84 to 2.86. Dolomite is distinguished from calcite by its markedly weaker reaction with cold dilute hydrochloric acid. Its rhombohedral crystals with curved faces, together with a subconchoidal fracture, help distinguish hand specimens.

Dolomite is a calcium magnesium carbonate that forms the rock dolomite (dolostone). Its curved, saddle-shaped crystal faces are distinctive. It is distinguished from calcite by its weaker reaction with dilute hydrochloric acid.

Kristallsystem Trigonal
Mineralklasse 05 Carbonates and Nitrates
Mohshärte 3.5-4.0
Dichte 2.84-2.86
Farbe Colorless, white, pink, gray, brown
Glanz Vitreous
Strichfarbe White
Spaltbarkeit Perfect rhombohedral {1011}
Bruch Subconchoidal
Transparenz Transparent
Kristallhabitus Rhombohedral with curved faces (saddle-shaped)

Mohshärte

Mohs Hardness: 3,5 – 4,0
1 Soft10 Hard
Dolomite has a Mohs hardness of 3.5–4 on the 1–10 mineral hardness scale.
Mohshärte Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Kristallsystem

Trigonal
Dolomite crystallizes in the Trigonal crystal system.
Eigenschaft Value
Kristallsystem Trigonal (Rhombohedral)
Axial Relationships a = b = c, α = β = γ ≠ 90°

Frequently Asked Questions

What is the hardness of Dolomite?
Dolomite has a Mohs hardness of 3.5-4.0.
What crystal system does Dolomite belong to?
Dolomite crystallizes in the Trigonal crystal system.
What color is Dolomite?
Dolomite is typically Colorless, white, pink, gray, brown.
What type of luster does Dolomite have?
Dolomite exhibits a Vitreous luster.
What is the chemical formula of Dolomite?
The chemical formula of Dolomite is CaMg(CO3)2.