RockVault
Dolomite

Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)

trigonalcommonCarbonates

Dolomite

CaMg(CO3)2

This image displays a cluster of well-formed, translucent, white to pale pink rhombohedral dolomite crystals, exhibiting distinct cleavage faces and a vitreous luster.

Dolomite Physical Properties

Mohs Hardness

3.5

Crystal System

trigonal

Luster

vitreous

Streak Color

white

Cleavage

Perfect rhombohedral on {1011}

Fracture

conchoidal

Specific Gravity

2.85

Colors

white, pink, gray, brown, green, black

Transparency

transparent

Type Locality

Azcárate Quarry, Eugui, Esteribar, Navarre, Spain

Mineral Group

Carbonates

Uses

construction material, soil conditioner, magnesium source, ornamental stone, flux in metallurgy

Associated Minerals

calcite, quartz, barite, fluorite, galena, sphalerite

Rarity

common

Geological Context

Dolomite is a common rock-forming mineral that primarily forms in sedimentary environments, often through the diagenetic alteration of limestone (dolomitization) or as a primary precipitate in hypersaline conditions. It is the main component of the sedimentary rock dolostone.