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A hydrous silicate of alumina, of a greenish color, which, in certain states of humidity, appears transparent and almost gelatinous.

a white to blue or gray color, occuring commonly in dodecahedrons, also massive. It is a silicate of alumina and soda with some chlorine.

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

found usually in thin, wedge-shaped crystals of a yellow or green to black color. It is a silicate of titanium and calcium; titanite.

ish, or emerald-green color, occuring in prismatic crystals, often of great size. It is a silicate of aluminia and lithia. See Hiddenite.

ing in prismatic crystals, often twinned so as to form groups resembling a cross. It is a silicate of aluminia and iron, and is generally found imbedded in mica schist. Called also granatite, and grenatite.

red permanent by sprinklings of water, in which is mixed a proportion of soluble glass (a silicate of soda).

A common mineral of the zeolite family, a hydrous silicate of alumina and lime, usually occurring in sheaflike aggregations of crystals, also in radiated masses. It is of a white or yellowish color, with pearly luster on the cleavage surface. Called also desmine.

curring in foliated flates, also in velvety bronze-colored incrustations. It is a hydrous silicate of iron and alumina.

in the manufacture of artificial paste gems, which consists essentially of a complex borosilicate of lead and potassium. Cf. Glass.

A concretion in the joints of the bamboo, which consists largely or chiefly of pure silica. It is highly valued in the East Indies as a medicine for the cure of bilious vomitings, bloody flux, piles, and various other diseases.

greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety. Indurated talc, an impure, slaty talc, with a nearly compact texture, and greater hardness than common talc; -- called also talc slate.…

A silicate of manganese of an ash-gray color.

e earth] (Com.), a white amorphous earthy substance consisting of burnt gypsum, aluminium silicate (kaolin), or some similar ingredient, as magnesia. It is sometimes used to adulterate certain foods, spices, candies, paints, etc. -- Terra cotta. Etym: [It., fr. terra earth + cotta, fem. of cotto cooked, L. coctus, p.p…

zeolitic mineral, occurring generally in masses of a radiated structure. It is a hydrous silicate of aluminia, lime, and soda. Called also mesole, and comptonite.

brown to black color, or, as in the variety orangite, orange-yellow. It is essentially a silicate of thorium.

gregation of minute scales having an olive-green color and pearly luster. It is a hydrous silicate of aluminia and iron.

pounds of titanium with some other elements; as, titano- cyanide, titano-fluoride, titano-silicate, etc.

greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem.

crosses at right angles to the greatest length, and between the nave and choir. In the basilicas, this had often no projection at its two ends. In Gothic churches these project these project greatly, and should be called the arms of the transept. It is common, however, to speak of the arms themselves as the transepts.…