English definition of Pyroxene

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Definition of pyroxene

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Pyroxene (n.) A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90¡, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basa

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Uralitization :: Uralitization (n.) The change of pyroxene to amphibole by paramorphism.

Andesite :: Andesite (n.) An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene..

Pyroxenic :: Pyroxenic (a.) Containing pyroxene; composed chiefly of pyroxene.

Lherzolite :: Lherzolite (n.) An igneous rock consisting largely of chrysolite, with pyroxene and picotite (a variety of spinel containing chromium)..

Malacolite :: Malacolite (n.) A variety of pyroxene.

Augite :: Augite (n.) A variety of pyroxene, usually of a black or dark green color, occurring in igneous rocks, such as basalt; -- also used instead of the general term pyroxene..

Coccolite :: Coccolite (n.) A granular variety of pyroxene, green or white in color..

Pyroxene :: Pyroxene (n.) A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90¡, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basa

Hypersthene :: Hypersthene (n.) An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface..

Diopside :: Diopside (n.) A crystallized variety of pyroxene, of a clear, grayish green color; mussite..

Rensselaerite :: Rensselaerite (n.) A soft, compact variety of talc,, being an altered pyroxene. It is often worked in a lathe into inkstands and other articles..

Babingtonite :: Babingtonite (n.) A mineral occurring in triclinic crystals approaching pyroxene in angle, and of a greenish black color. It is a silicate of iron, manganese, and lime..

Jeffersonite :: Jeffersonite (n.) A variety of pyroxene of olive-green color passing into brown. It contains zinc.

Bronzite :: Bronzite (n.) A variety of enstatite, often having a bronzelike luster. It is a silicate of magnesia and iron, of the pyroxene family..

Pyroxenite :: Pyroxenite (n.) A rock consisting essentially of pyroxene.

Ophite :: Ophite (n.) A greenish spotted porphyry, being a diabase whose pyroxene has been altered to uralite; -- first found in the Pyreness. So called from the colored spots which give it a mottled appearance..

Aphanite :: Aphanite (n.) A very compact, dark-colored /ock, consisting of hornblende, or pyroxene, and feldspar, but neither of them in perceptible grains..

Asbestos :: Asbestos (n.) A variety of amphibole or of pyroxene, occurring in long and delicate fibers, or in fibrous masses or seams, usually of a white, gray, or green-gray color. The name is also given to a similar variety of serpentine..

Fassaite :: Fassaite (n.) A variety of pyroxene, from the valley of Fassa, in the Tyrol..

Salite :: Salite (n.) A massive lamellar variety of pyroxene, of a dingy green color..