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Sulphur :: Sulphur (n.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral sulphur is 2.05; of prismatic sulphur, 1.96..

Stanno- :: Stannite (n.) A mineral of a steel-gray or iron-black color; tin pyrites. It is a sulphide of tin, copper, and iron..

Lav/sium :: Lav/sium (n.) A supposed new metallic element. It is said to have been discovered in pyrites, and some other minerals, and to be of a silver-white color, and malleable..

Pyritiferous :: Pyritiferous (a.) Containing or producing pyrites.

Seleniferous :: Seleniferous (a.) Containing, or impregnated with, selenium; as, seleniferous pyrites..

Brat :: Brat (n.) A thin bed of coal mixed with pyrites or carbonate of lime.

Thallium :: Thallium (n.) A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7..

Brass :: Brass (n.) Lumps of pyrites or sulphuret of iron, the color of which is near to that of brass..

Chalcopyrite :: Chalcopyrite (n.) Copper pyrites, or yellow copper ore; a common ore of copper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color..

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

Bisulphide :: Bisulphide (n.) A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret..

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

Pyritohedral :: Pyritohedral (a.) Like pyrites in hemihedral form.

Magistral :: Magistral (n.) Powdered copper pyrites used in the amalgamation of ores of silver, as at the Spanish mines of Mexico and South America..

Firestone :: Firestone (n.) Iron pyrites, formerly used for striking fire; also, a flint..

Copperas :: Copperas (n.) Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate..

Gossan :: Gossan (n.) Decomposed rock, usually reddish or ferruginous (owing to oxidized pyrites), forming the upper part of a metallic vein..

Mispickel :: Mispickel (n.) Arsenical iron pyrites; arsenopyrite.

Arsenopyrite :: Arsenopyrite (n.) A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel..

Pyritize :: Pyritize (v. t.) To convert into pyrites.

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