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Polyhalite :: Polyhalite (n.) A mineral usually occurring in fibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda..

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

Pinite :: Pinite (n.) A compact 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..

Pyrosmalite :: Pyrosmalite (n.) A mineral, usually of a pale brown or of a gray or grayish green color, consisting chiefly of the hydrous silicate of iron and manganese; -- so called from the odor given off before the blowpipe..

Vat :: Vat (n.) A wooden tub for washing ores and mineral substances in.

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..

Boron :: Boron (n.) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a deep olive color, in a semimetallic form, and in colorless quadratic crystals similar to the diamond in hardness and other properties. It occurs in nature also in boracite, datolite, tourmaline, and some other minerals. Atomic weight 10.9. Symbol B..

Levynite :: Levynite (n.) A whitish, reddish, or yellowish, transparent or translucent mineral, allied to chabazite..

Pyrognostics :: Pyrognostics (n. pl.) The characters of a mineral observed by the use of the blowpipe, as the degree of fusibility, flame coloration, etc..

Olivine :: Olivine (n.) A common name of the yellowish green mineral chrysolite, esp. the variety found in eruptive rocks..

Helium :: Helium (n.) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.

Chromite :: Chromite (n.) A black submetallic mineral consisting of oxide of chromium and iron; -- called also chromic iron.

Mineralizing :: Mineralizing (p. pr. & vb. n.) of Mineraliz.

Gypsum :: Gypsum (n.) A mineral consisting of the hydrous sulphate of lime (calcium). When calcined, it forms plaster of Paris. Selenite is a transparent, crystalline variety; alabaster, a fine, white, massive variety..

Ledge :: Ledge (n.) A lode; a limited mass of rock bearing valuable mineral.

Hauerite :: Hauerite (n.) Native sulphide of manganese a reddish brown or brownish black mineral.

Lanthanum :: Lanthanum (n.) A rare element of the group of the earth metals, allied to aluminium. It occurs in certain rare minerals, as cerite, gadolinite, orthite, etc., and was so named from the difficulty of separating it from cerium, didymium, and other rare elements with which it is usually associated. Atomic weight 138.5. Symbol La..

Beryl :: Beryl (n.) A mineral of great hardness, and, when transparent, of much beauty. It occurs in hexagonal prisms, commonly of a green or bluish green color, but also yellow, pink, and white. It is a silicate of aluminium and glucinum (beryllium). The aquamarine is a transparent, sea-green variety used as a gem. The emerald is another variety highly prized in jewelry, and distinguished by its deep color, which is probably due to the presence of a little oxide of chromium..

Melanochroite :: Melanochroite (n.) A mineral of a red, or brownish or yellowish red color. It is a chromate of lead; -- called also phoenicocroite..

Train :: Train (v. t.) To trace, as a lode or any mineral appearance, to its head..

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