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Bergmeal :: Bergmeal (n.) An earthy substance, resembling fine flour. It is composed of the shells of infusoria, and in Lapland and Sweden is sometimes eaten, mixed with flour or ground birch bark, in times of scarcity. This name is also given to a white powdery variety of calcite..

Dimorphism :: Dimorphism (n.) Crystallization in two independent forms of the same chemical compound, as of calcium carbonate as calcite and aragonite..

Pisolite :: Pisolite (n.) A variety of calcite, or calcium carbonate, consisting of aggregated globular concretions about the size of a pea; -- called also peastone, peagrit..

Calc-spar :: Calc-spar (n.) Same as Calcite.

Calc-sinter :: Calc-sinter (n.) See under Calcite.

Calcite :: Calcite (n.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar..

Allomorph :: Allomorph (n.) Any one of two or more distinct crystalline forms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite..

Shiver-spar :: Shiver-spar (n.) A variety of calcite, so called from its slaty structure; -- called also slate spar..

Marble :: Marble (n.) A massive, compact limestone; a variety of calcite, capable of being polished and used for architectural and ornamental purposes. The color varies from white to black, being sometimes yellow, red, and green, and frequently beautifully veined or clouded. The name is also given to other rocks of like use and appearance, as serpentine or verd antique marble, and less properly to polished porphyry, granite, etc..

Aphrite :: Aphrite (n.) See under Calcite.

Calcareous :: Calcareous (a.) Partaking of the nature of calcite or calcium carbonate; consisting of, or containing, calcium carbonate or carbonate of lime..

Rhodochrosite :: Rhodochrosite (n.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite..

Aragonite :: Aragonite (n.) A mineral identical in composition with calcite or carbonate of lime, but differing from it in its crystalline form and some of its physical characters..

Stinkweed :: Stinkstone (n.) One of the varieties of calcite, barite, and feldspar, which emit a fetid odor on being struck; -- called also swinestone..

Ferrocalcite :: Ferrocalcite (n.) Limestone containing a large percentage of iron carbonate, and hence turning brown on exposure..

Baryto-calcite :: Baryto-calcite (n.) A mineral of a white or gray color, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium..

Dimorph :: Dimorph (n.) Either one of the two forms of a dimorphous substance; as, calcite and aragonite are dimorphs..

Iceland Spar :: Iceland spar () A transparent variety of calcite, the best of which is obtained in Iceland. It is used for the prisms of the polariscope, because of its strong double refraction. Cf. Calcite..

Argentine :: Argentine (n.) A siliceous variety of calcite, or carbonate of lime, having a silvery-white, pearly luster, and a waving or curved lamellar structure..

Nitrocalcite :: Nitrocalcite (n.) Nitrate of calcium, a substance having a grayish white color, occuring in efforescences on old walls, and in limestone caves, especially where there exists decaying animal matter..

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