Definition of dolomite in English:

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Pronunciation: /ˈdäləmīt/
Pronunciation: /ˈdōləmīt/


1A translucent mineral consisting of a carbonate of calcium and magnesium.
Example sentences
  • Vein minerals are aragonite, barite, calcite, dolomite, quartz, sphalerite, and whewellite.
  • Vein minerals are ferroan dolomite, barite, calcite, pyrite, and quartz.
  • Red chalcedony-lined geodes were prevalent at one time, their inclusions typically being quartz, calcite, ferroan dolomite, and iron sulfide microcrystals.
1.1A sedimentary rock formed chiefly of dolomite.
Example sentences
  • In the Mesozoic, and into the Paleocene, limestone and dolomite interbedded with shale, clay and anhydrite prevailed in a more restricted, shallow marine to lagoonal environment.
  • The host rocks for these deposits include limestone and dolomite that have undergone dissolution by low-temperature fluids, either before or during the mineralizing event.
  • Polyphase deformation accompanied metamorphism of the original sediments, that were probably dolomite, shales and siltstones.



Pronunciation: /ˌdäləˈmidik/
Example sentences
  • The Barton Creek dolomite is in fact a dolomitic limestone, strongly recrystallized.
  • If considered irrespective of depth, limestones and dolomitic limestones are more porous than dolostones, whereas at burial depths of greater than 2000 m dolostones are significantly more porous and permeable than limestones.
  • The cavity was in relatively dense dolomitic limestone, suggesting that recovery of undamaged specimens could present a problem.


Late 18th century: from French, from the name of Dolomieu (1750–1801), the French geologist who discovered it, + -ite1.

For editors and proofreaders

Syllabification: do·lo·mite

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