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A mineral consisting of the carbonate of lime and magnesia in varying proportions. It occurs in distinct crystals, and in extensive beds as a compact limestone, often crystalline granular, either white or clouded. It includes much of the common white marble. Also called bitter spar.

A mineral closely related to dolomite, but containing iron.

A common name of dolomite; -- so called because it contains magnesia, the soluble salts of which are bitter. See Dolomite.

ping paper, made of unbleached materials. -- Brown spar (Min.), a ferruginous variety of dolomite, in part identical with ankerite. -- Brown stone. See Brownstone. -- Brown stout, a strong kind of proter or malt liquor. -- Brown study, a state of mental abstraction or serious reverie. W. Irving.

A magnesian variety of dolomite.

Pertaining to dolomite.

To convert into dolomite. -- Dol`o*mi*za"tion, n.

, characterized by, or containing, magnesia or magnesium. Magnesian limestone. (Min.) See Dolomite.

aphy where a strong actinic illuminant is required. Its compounds occur abundantly, as in dolomite, talc, meerschaum, etc. Symbol Mg. Atomic weight, 24.4. Specific gravity, 1.75. Magnesium sulphate. (Chem.) Same as Epsom salts.

rains. -- Pearl sinter (Min.), fiorite. -- Pearl spar (Min.), a crystallized variety of dolomite, having a pearly luster. -- Pearl white. (a) Basic bismuth nitrate, or bismuth subchloride; - - used chiefly as a cosmetic. (b) A variety of white lead blued with indigo or Berlin blue.

ith magnesia, potash, and some fluorine. It is characteristic of crystalline limestone or dolomite and serpentine. See Mica.

A variety of dolomite.