Definition of calcite in US English:



  • A white or colorless mineral consisting of calcium carbonate. It is a major constituent of sedimentary rocks such as limestone, marble, and chalk, can occur in crystalline form (as in Iceland spar), and may be deposited in caves to form stalactites and stalagmites.

    • ‘This cavity may then be filled with coal, calcite, siderite, or any other form of sediment.’
    • ‘Matrix minerals of the septaria are ferroan dolomite, quartz, calcite, and pyrite.’
    • ‘In some geodes, the brown calcite is completely hidden by clear calcite secondary growth.’
    • ‘The sparry calcite is interpreted as a single phase of precipitation that infilled external moulds of the arthropod.’
    • ‘The main gangue minerals that make up the vein are massive white calcite, quartz, and prehnite.’
    • ‘The calcite and other such minerals suffered greatly from exposure to the weather.’
    • ‘Analcime may also be associated with quartz crystals, calcite, and common opal.’
    • ‘Zeolite veins appear to be later than prehnite veins, and calcite is the last mineral to form veins in the dyke samples.’
    • ‘Phosphate may also replace calcite or be precipitated instead of calcite in neutral or slightly acidic pH conditions.’
    • ‘The trick to recovering fine specimens is to collect the chunks of rock showing prehnite and calcite.’
    • ‘The nonzeolites apophyllite, calcite, and quartz commonly occur at many localities.’
    • ‘Experimental data ranges for both quartz and calcite rocks are indicated along the stress axis.’
    • ‘Strontium concentrations in seawater reflect the diagenesis of Sr-rich aragonite to calcite on continental shelves.’
    • ‘Abundant thin calcite and quartz veins cut the schists, and have been boudinaged and rotated parallel to the first cleavage.’
    • ‘The calcite formed scalenohedral and rhombohedral crystals on some of the quartz crystal groups.’
    • ‘Around one corner, the mine became snow white with calcite and sodium chloride.’
    • ‘Other than clay minerals, calcite and pyrite are the most common secondary minerals present.’
    • ‘The major mineral constituents of coal balls are calcite, dolomite, ferroan dolomite and pyrite.’
    • ‘The limestone is highly fractured and contains abundant calcite and quartz veins.’
    • ‘Quartz is the dominant mineral in veins in siliceous rocks, calcite in limestones, and gypsum in gypsiferous sediments.’
    • ‘The walls of the cave were clean white limestone and decorated with pretty cave flowers and calcite crystals.’
    • ‘Specimens of this unusual calcite are on display at the Mineral Museum.’
    • ‘Further up the core into the Waulsortian sequence, the limestones are cleaner and the breccia clasts are cemented by calcite.’


Mid 19th century: coined in German from Latin calx, calc- ‘lime’ (see calx).