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Erythrite :: Erythrite (n.) A rose-red mineral, crystallized and earthy, a hydrous arseniate of cobalt, known also as cobalt bloom; -- called also erythrin or erythrine..

Molybdenite :: Molybdenite (n.) A mineral occurring in soft, lead-gray, foliated masses or scales, resembling graphite; sulphide of molybdenum..

Nickel :: Nickel (n.) A bright silver-white metallic element. It is of the iron group, and is hard, malleable, and ductile. It occurs combined with sulphur in millerite, with arsenic in the mineral niccolite, and with arsenic and sulphur in nickel glance. Symbol Ni. Atomic weight 58.6..

Stilt :: Stilpnomelane (n.) A black or greenish black mineral occurring in foliated flates, also in velvety bronze-colored incrustations. It is a hydrous silicate of iron and alumina..

Mineralogies :: Mineralogies (pl. ) of Mineralog.

Structure :: Structure (n.) Arrangement of parts, of organs, or of constituent particles, in a substance or body; as, the structure of a rock or a mineral; the structure of a sentence..

Stone :: Stone (n.) Concreted earthy or mineral matter; also, any particular mass of such matter; as, a house built of stone; the boy threw a stone; pebbles are rounded stones..

Leucite :: Leucite (n.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius..

Tellurium :: Tellurium (n.) A rare nonmetallic element, analogous to sulphur and selenium, occasionally found native as a substance of a silver-white metallic luster, but usually combined with metals, as with gold and silver in the mineral sylvanite, with mercury in Coloradoite, etc. Symbol Te. Atomic weight 125.2..

Samarskite :: Samarskite (a.) A rare mineral having a velvet-black color and submetallic luster. It is a niobate of uranium, iron, and the yttrium and cerium metals..

Crocidolite :: Crocidolite (n.) A mineral occuring in silky fibers of a lavender blue color. It is related to hornblende and is essentially a silicate of iron and soda; -- called also blue asbestus. A silicified form, in which the fibers penetrating quartz are changed to oxide of iron, is the yellow brown tiger-eye of the jewelers..

Vermilion :: Vermilion (n.) A bright red pigment consisting of mercuric sulphide, obtained either from the mineral cinnabar or artificially. It has a fine red color, and is much used in coloring sealing wax, in printing, etc..

Fluxible :: Fluxible (a.) Capable of being melted or fused, as a mineral..

Mellitic :: Mellitic (a.) Pertaining to, or derived from, the mineral mellite..

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..

Nest :: Nest (n.) An aggregated mass of any ore or mineral, in an isolated state, within a rock..

Unctuous :: Unctuous (a.) Having a smooth, greasy feel, as certain minerals..

Microlite :: Microlite (n.) A minute inclosed crystal, often observed when minerals or rocks are examined in thin sections under the microscope..

Helvite :: Helvite (n.) A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur..

Mineral :: Mineral (v. i.) A mine.

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