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its verdure. -- Emerald spodumene, or Lithia emerald. (Min.) See Hiddenite. -- Emerald nickel. (Min.) See Zaratite.

An amorphous mineral of apple-green color; a hydrous silicate of nickel and magnesia. It is an important ore of nickel.

y, hard and tough, but malleable and ductile, and quite permanent in the air. It contains nickel, copper, and zinc in varying proportions, and was originally made from old copper slag at Henneberg. A small amount of iron is sometimes added to make it whiter and harder. It is essentially identical with the Chinese alloy…

, and often the chief, ingredient of meteorites. It invariably contains a small amount of nickel and cobalt. Cf. Meteorite. -- Pig iron, the form in which cast iron is made at the blast furnace, being run into molds, called pigs. -- Reduced iron. See under Reduced. -- Specular iron. See Hematite. -- Too many irons…

ails of which are secret. It is understood to involve the addition of chromium as well as nickel to the metal, and to include a treatment like that of the Harvey process with unknown variations or additions. The product is mentioned by some authors, as improved Harvey, or Harvey-Krupp armor plate.

rring in isometric crystals, and also massive. It is a sulphide of cobalt containing some nickel or copper.

Any metal, as iron, nickel, cobalt, etc., which may receive, by any means, the properties of the loadstone, and which then, when suspended, fixes itself in the direction of a magnetic meridian.

of a powerful magnet. -- Magnetic elements. (a) (Chem. Physics) Those elements, as iron, nickel, cobalt, chromium, manganese, etc., which are capable or becoming magnetic. (b) (Physics) In respect to terrestrial magnetism, the declination, inclination, and intensity. (c) See under Element. -- Magnetic equator, the li…

A sulphide of nickel, commonly occurring in delicate capillary crystals, also in incrustations of a bronze yellow; -- sometimes called hair pyrites.

An alloy consisting of copper, nickel, tungsten, and aluminium; -- used by jewelers.

An alloy resembling silver, and consisting chiefly of copper, zinc, and nickel, with small proportions of tin, aluminium, and bismuth. Ure.

A mineral of a copper-red color and metallic luster; an arsenide of nickel; -- called also coppernickel, kupfernickel.

A rare metallic element, of doubtful identification, said to occur in the copper-nickel of Norway.

A Chinese alloy of nickel, zinc, and copper, resembling German silver.

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

able laboratory temperatures (Lockyer); as protocalcium, protochromium, protocopper, protonickel, protosilicon, protostrontium, prototitanium, protovanadium. -- Pro`to*me*tal"ic (#), a.

A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.

A mineral occurring in steel-gray flexible folia. It contains iron, nickel, and phosphorus, and is found only in meteoric iron.

A tin-white or gray mineral of metallic luster. It is an arsenide of cobalt, nickel, and iron. Called also speiskobalt.

A regulus consisting essentially of nickel, obtained as a residue in fusing cobalt and nickel ores with silica and sodium carbonate to make smalt.