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Stinkweed :: Stinkstone (n.) One of the varieties of calcite, barite, and feldspar, which emit a fetid odor on being struck; -- called also swinestone..

Hyalophane :: Hyalophane (n.) A species of the feldspar group containing barium. See Feldspar.

Orthoclase :: Orthoclase (n.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.

Feldspar :: Feldspar (n.) Alt. of Feldspat.

Granulite :: Granulite (n.) A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite..

Felspath :: Felspath (n.) See Feldspar.

Chesterlite :: Chesterlite (n.) A variety of feldspar found in crystals in the county of Chester, Pennsylvania..

Feldspathose :: Feldspathose (a.) Pertaining to, or consisting of, feldspar..

Perthite :: Perthite (n.) A kind of feldspar consisting of a laminated intertexture of albite and orthoclase, usually of different colors..

Diorite :: Diorite (n.) An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called greenstone..

Orthoclastic :: Orthoclastic (a.) Breaking in directions at right angles to each other; -- said of the monoclinic feldspars.

Saussurite :: Saussurite (n.) A tough, compact mineral, of a white, greenish, or grayish color. It is near zoisite in composition, and in part, at least, has been produced by the alteration of feldspar..

Microcline :: Microcline (n.) A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form..

Amazon Stone :: Amazon stone (n.) A variety of feldspar, having a verdigris-green color..

Sunstroke :: Sunstone (n.) Aventurine feldspar. See under Aventurine.

Anorthite :: Anorthite (n.) A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime feldspar. See Feldspar..

Oligoclase :: Oligoclase (n.) A triclinic soda-lime feldspar. See Feldspar.

Element :: Element (n.) One of the ultimate parts which are variously combined in anything; as, letters are the elements of written language; hence, also, a simple portion of that which is complex, as a shaft, lever, wheel, or any simple part in a machine; one of the essential ingredients of any mixture; a constituent part; as, quartz, feldspar, and mica are the elements of granite..

Porphyritic :: Porphyritic (a.) Relating to, or resembling, porphyry, that is, characterized by the presence of distinct crystals, as of feldspar, quartz, or augite, in a relatively fine-grained base, often aphanitic or cryptocrystalline..

Plagioclase :: Plagioclase (n.) A general term used of any triclinic feldspar. See the Note under Feldspar.

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