Definition of dolomite in English:



mass noun
  • 1A translucent mineral consisting of a carbonate of calcium and magnesium, usually also containing iron.

    • ‘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.’
    • ‘The order of deposition for the main vein minerals typically is dolomite, barite, and quartz.’
    • ‘Vein minerals are barite, calcite, ferroan dolomite, and sphalerite.’
    • ‘Barite, dolomite, and quartz crystals were scattered on the surfaces of the calcite.’
    • ‘Thus. it is clear that at one point in the history of these specimens they appeared as normal quartz crystals perched upon a matrix of rhombohedral carbonate, likely dolomite.’
    • ‘The concretion matrix is dominantly an interlocking mosaic of calcite, ferroan dolomite and quartz.’
    • ‘On the dumps I found galena, pyrite, and rugs full of quartz, dolomite, and a few tiny, water-clear fluorites.’
    • ‘Other carbonates, like dolomite, will fizz in cold acid only after they have been powdered.’
    • ‘Many choice specimens of sphalerite, calcite, galena, and dolomite could be collected from pillars and small areas not previously mined.’
    • ‘Orissa is rich in bauxite, the mineral that contains aluminium's raw material, as well as coal, limestone, silica, chromite, dolomite and nickel, to mention a few sources of its mineral wealth.’
    • ‘A 2000 study detected lead in some supplements made from oyster shells, the mineral dolomite, and bone meal.’
    • ‘Now, not in competition with dolomite, the quartz was able to form better-developed crystals.’
    • ‘Helicopters dropped 5,000 tonnes of sand, boron, dolomite, clay and lead onto it.’
    • ‘They are easy to grow - simply make a trench in prepared soil, dust with dolomite, add some blood and bone or animal manure with a light sprinkle of sulphate of potash.’
    • ‘Belgium is also an important producer of several industrial minerals, including limestone, dolomite, whiting, sodium sulfate, silica sand, and marble.’
    • ‘Military personnel were called on to drop thousands of tons of sand, clay, lead, dolomite, and boron on the damaged reactor to smother the radiation stream, often without adequate protection.’
    • ‘The mine produced excellent dolomite crystals that are arguably the best for the species from the United States.’
    • ‘In addition to large dolomite crystals, calcite " fans " and similar structures are frequently observed.’
    1. 1.1A sedimentary rock formed chiefly of dolomite.
      • ‘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.’
      • ‘It lies within the Valley and Ridge physiographic province which is characterized by a predominance of dolomite and limestone interposed with shale and sandstone.’
      • ‘Near site 8, late Jurassic limestone and dolomite are shown in white.’
      • ‘The same is true for dolomite in limestone, at least at relatively low temperatures.’
      • ‘Shallow soils and rock outcrops of limestone or dolomite characterize these glades; dry conditions prevail during the growing season, although soils can be saturated or flooded in winter and spring.’
      • ‘This correlation is also expressed in the displacement pressures from mercury injection capillary measurements, which permit the identification of four major and two minor dolomite reservoir rock types.’
      • ‘The formation is composed largely of dark limestone and dolomite.’
      • ‘The chemical composition of eggshell includes calcium and phosphorus, in similar proportions to bone, or to the rock called dolomite.’
      • ‘The Blaine Formation is over 200 m thick, composed of interbedded mudstone, gypsum in beds up to 10 m thick, and has regionally traceable members of limestone and dolomite.’
      • ‘The bedrock is dolomite with pH of 7-8, which is 15-24 m below the surface.’
      • ‘Underlying the glacial deposits is approximately 330 ft of Devonian limestone and dolomite.’
      • ‘Warren and Cook stated that crystals of gypsum have been found as a late-stage mineral on altered dolomite.’
      • ‘It is well cemented with early iron oxide, quartz overgrowth and clay cements with some dolomite blocking pore throats.’
      • ‘There are significant differences in the clay mineral compositions of the Barton Creek dolomite, spheroid and diamictite units.’
      • ‘The minerals are deposited in lakes, deltas and meander further downstream, where they build up and form sedimentary rocks such as calcite, selenite, pyrite and dolomite.’
      • ‘He's a rugged 55-year-old American expat who runs a mining operation that supplies magnesium-rich dolomite to banana growers.’
      • ‘Striking specimens of red cuprite-included calcite and dolomite were once commonly available.’
      • ‘Middle Triassic anhydrite and dolomite form a sequence of strong reflectors, as does Lower Cretaceous sandstone.’


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