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Pitchblende :: Pitchblende (n.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

Alter :: Alter (v. i.) To become, in some respects, different; to vary; to change; as, the weather alters almost daily; rocks or minerals alter by exposure..

Zircon :: Zircon (n.) A mineral occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colorless, pale-yellow or smoky-brown varieties from Ceylon are called jargon..

Cannel Coal :: Cannel coal () A kind of mineral coal of a black color, sufficiently hard and solid to be cut and polished. It burns readily, with a clear, yellow flame, and on this account has been used as a substitute for candles..

Salt :: Salt (n.) Any mineral salt used as an aperient or cathartic, especially Epsom salts, Rochelle salt, or Glauber's salt..

Bruise :: Bruise (v. t.) To break; as in a mortar; to bray, as minerals, roots, etc.; to crush..

Talc :: Talc (n.) A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety..

Viridite :: Viridite (n.) A greenish chloritic mineral common in certain igneous rocks, as diabase, as a result of alternation..

Mineral :: Mineral (v. i.) An inorganic species or substance occurring in nature, having a definite chemical composition and usually a distinct crystalline form. Rocks, except certain glassy igneous forms, are either simple minerals or aggregates of minerals..

Prospector :: Prospector (n.) One who prospects; especially, one who explores a region for minerals and precious metals..

Thorite :: Thorite (n.) A mineral of a brown to black color, or, as in the variety orangite, orange-yellow. It is essentially a silicate of thorium..

Aluminous :: Aluminous (a.) Pertaining to or containing alum, or alumina; as, aluminous minerals, aluminous solution..

Schiller :: Schiller (n.) The peculiar bronzelike luster observed in certain minerals, as hypersthene, schiller spar, etc. It is due to the presence of minute inclusions in parallel position, and is sometimes of secondary origin..

Schilerization :: Schilerization (n.) The act or process of producing schiller in a mineral mass.

Paramorphism :: Paramorphism (n.) The change of one mineral species to another, so as to involve a change in physical characters without alteration of chemical composition..

Wernerian :: Wernerian (a.) Of or pertaining to A. G. Werner, The German mineralogist and geologist, who classified minerals according to their external characters, and advocated the theory that the strata of the earth's crust were formed by depositions from water; designating, or according to, Werner's system..

Glaucodot :: Glaucodot (n.) A metallic mineral having a grayish tin-white color, and containing cobalt and iron, with sulphur and arsenic..

Strontium :: Strontium (n.) A metallic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3..

Mineralogy :: Mineralogy (n.) A treatise or book on this science.

Thuringite :: Thuringite (n.) A mineral occurring as an aggregation of minute scales having an olive-green color and pearly luster. It is a hydrous silicate of aluminia and iron.

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