Paragonite: alternatives and connections

Soda ash; caustic soda, caustic potash, etc.

An earth abounding in pyrites, used by the ancients to kill insects, etc., on vines; -- applied by Brongniart to a carbonaceous alum s…

the use of closed-class words instead of inflections: e.g., ‘the father of the bride’ instead of ‘the bride's father’

The use of some epithet or the name of some office, dignity, or the like, instead of the proper name of the person; as when his majest…

Argillaceous schist or slate; clay slate. Its colors is bluish or blackish gray, sometimes greenish gray, brownish red, etc.

Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.

On the hither side of the Alps with reference to Rome, that is, on the south side of the Alps; -- opposed to transalpine.

A mineral occuring in silky fibers of a lavender blue color. It is related to hornblende and is essentially a silicate of iron and sod…

A colorless, inflammable, poisonous gas, C2N2, with a peach-blossom odor, so called from its tendency to form blue compounds; obtained…

A kind of Muscovite, or potash mica, containing water.

A powder of ipecac and opium, compounded, in the United States, with sugar of milk, but in England (as formerly in the United States)…

A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime,…

Laminated, but restricted to the variety of laminated structure found in crystalline schist, as mica schist, etc.; schistose.

A hard, brittle, translucent, and commonly transparent substance, white or colored, having a conchoidal fracture, and made by fusing t…

The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See…

Mica. See Mica.

A crystalline rock, consisting, like granite, of quartz, feldspar, and mica, but having these materials, especially the mica, arranged…

A crystalline, granular rock, consisting of quartz, feldspar, and mica, and usually of a whitish, grayish, or flesh-red color. It diff…