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A mineral occurring in small, green, transparent, monoclinic crystals. It is a hydrous phosphate of iron.

Magnesia alba Etym: [L.] (Med. Chem.), a bulky white amorphous substance, consisting of a hydrous basic carbonate of magnesium, and used as a mild cathartic.

Native hydrous carbonate of copper, usually occurring in green mammillary masses with concentric fibrous structure.

te claylike mineral, soft, and light enough when in dry masses to float in water. It is a hydrous silicate of magnesia, and is obtained chiefly in Asia Minor. It is manufacturd into tobacco pipes, cigar holders, etc. Also called sepiolite.

A hydrous sulphate of iron of a green color and vitreous luster; iron vitriol.

hite or yellowish, occuring in delicate groups of crystals, also fibrous massive. It is a hydrous silicate of alumina, lime, and soda.

of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda.

A greenish yellow or green mineral, consisting chiefly of the hydrous silicate of iron.

A massive and fibrous mineral of a whitish color, chiefly hydrous silicate of lime.

An olive-green mineral, a hydrous arseniate of copper; olive ore.

A hydrous borate of lime, near priceite.

A whitish mineral occurring in radiated or fibrous crystalline masses. It is a hydrous silicate of lime and soda.

A hydrous arsenate of lime, usually occurring in silky fibers of a white or grayish color.

A hydrous arsenate of iron occurring in green or yellowish green cubic crystals; cube ore.

A hydrous silicate of aluminia, lime, and soda, a zeolitic mineral commonly occurring in complex twin crystals, often cruciform in shape; -- called also christianite.

An apple-green mineral having a greasy feel. It is a hydrous silicate of nickel, magnesia, aluminia, and iron.

act granular cryptocrystalline mineral of a dull grayish or greenish white color. It is a hydrous alkaline silicate, and is derived from the alteration of other minerals, as iolite.

of Paris. Etym: [So called because originally brought from a suburb of Paris.] (Chem.) Anhydrous calcium sulphate, or calcined gypsum, which forms with water a paste which soon sets or hardens, and is used for casts, moldings, etc. The term is loosely applied to any plaster stone or species of gypsum. -- Plaster of P…

tes having a botryoidal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime.

A hydrous borate of lime, from Oregon.