Feldspar

Theme list: feldspar with definitions

61 entries

FRONT	WORD	BACK	DEFINITION
BCFT	ROCK	SY	[v. -ED, -ING, -S] · to move back and forth - ROCKABLE [a.] (=rockable)
—	ALBITE	S	[n. -S] [Wiktionary - Sense 1] A plagioclase feldspar, the first member of the Albite-Anorthite solid solution series.
H	APLITE	S	[n. -S] [Wiktionary - Sense 1] A fine-grained granitic rock composed mostly of quartz and feldspars.
—	ARKOSE	S	[n. -S] [Wiktionary - Sense 1] An arenite sandstone consisting of at least 25% feldspar grains.
—	FELSIC	—	[a.] · consisting of feldspar and silicates
—	NORITE	S	[n. -S] [Wiktionary - Sense 1] A granular crystalline rock consisting essentially of a triclinic feldspar (such as labradorite) and hypersthene.
—	SIALIC	—	[n. -S] [Wiktionary - Sense 3] Composed predominantly of silica- and alumina-bearing minerals such as quartz and feldspar.
—	DIABASE	S	[n. -S] [Wiktionary - Sense 1] A fine-grained igneous rock composed mostly of pyroxene and feldspar.
—	DIORITE	S	[n. -S] [Wiktionary - Sense 1] A grey intrusive igneous rock composed mostly of plagioclase feldspar, biotite, hornblende and/or pyroxene.
—	GRANITE	S	[n. -S] [Wiktionary - Sense 1] A group of igneous and plutonic rocks composed primarily of feldspar and quartz. Usually contains one or more dark minerals, which may be mica, pyroxene, or amphibole. Granite is quarried for building stone, road gravel, decorative stone, and tombstones. Common colors are gray, white, pink, and yellow-brown.
—	LEUCITE	S	[n. -S] [Wiktionary - Sense 1] A mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, leucite is a potassium feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, leucite weathers rapidly and can only be seen as inclusions in freshly broken rock.
—	MINERAL	S	[n. -S] · a naturally occurring inorganic substance having a characteristic set of physical properties
—	OPHITIC	—	[n. -S] [Wiktionary - Sense 1] Having crystals of feldspar interspersed with plates of augite.
—	SPILITE	S	[n. -S] [Wiktionary - Sense 1] a very fine-grained igneous rock, resembling an altered basalt, containing feldspar together with chlorite, calcite, and epidote etc.
—	UNAKITE	S	[n. -S] [Wiktionary - Sense 1] An altered granite composed of pink orthoclase feldspar, green epidote, and generally colorless quartz.
—	ADULARIA	S	[n. -S] [Wiktionary - Sense 1] A variety of orthoclase feldspar found as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens reflect a bluish sheen along crystal faces. This phenomenon is called adularescence, and adularia with this property is called moonstone. (See sanidine).
—	ANDESITE	S	[n. -S] [Wiktionary - Sense 1] Any of a class of fine-grained intermediate igneous rock, of volcanic origin, containing mostly plagioclase feldspar.
—	ECLOGITE	S	[n. -S] [Wiktionary - Sense 1] A coarse-grained metamorphic rock, a mixture of pyroxene, quartz, and feldspar with inclusions of red garnet.
—	FELDSPAR	S	[n. -S] · a mineral / ----- { feldspar felspar § feldspars felspars }
—	SANIDINE	S	[n. -S] [Wiktionary - Sense 1] A variety of orthoclase feldspar found as tabular crystals embedded in volcanic rocks. Some forms (called moonstone) exhibit adularescence.
—	SUNSTONE	S	[n. -S] [Wiktionary - Sense 1] A translucent form of feldspar having flakes of hematite, used as an ornamental stone.
—	TRACHYTE	S	[n. -S] [Wiktionary - Sense 1] A pale igneous rock consisting mostly of potassium feldspar and plagioclase.
—	AMAZONITE	S	[n. -S] [Wiktionary - Sense 1] A gem variety of microcline feldspar, varying from bright verdigris green to a bluish green.
—	ANORTHITE	S	[n. -S] [Wiktionary - Sense 1] A variety of plagioclase feldspar, the calcium endmember of that series.
—	FELDSPARS	—	[n. -S] [Wiktionary - Sense 1] plural of feldspar
—	GRANULITE	S	[n. -S] [Wiktionary - Sense 1] A fine-grained metamorphic rock composed chiefly of feldspar, quartz, and garnets.
—	GREYWACKE	S	[n. -S] [Wiktionary - Sense 1] A hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.
—	MONZONITE	S	[n. -S] · a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals
—	MOONSTONE	S	[n. -S] [Wiktionary - Sense 1] A translucent gemstone, an orthoclase feldspar, that has a pearly lustre.
—	NEPHELINE	S	[n. -S] [Wiktionary - Sense 1] A feldspathoid mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, nepheline is a plagioclase feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, nepheline weathers rapidly and can only be seen as inclusions in freshly broken rock.
—	PEGMATITE	S	[n. -S] [Wiktionary - Sense 1] A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica.
—	PHONOLITE	S	[n. -S] [Wiktionary - Sense 1] A light-coloured rock of volcanic origin composed mostly of alkali feldspars.
—	PORCELAIN	S	[n. -S] [Wiktionary - Sense 1] A hard white translucent ceramic, originally made by firing kaolin, quartz, and feldspar at high temperatures but now also inclusive of similar artificial materials; also often (figurative) such a material as a symbol of the fragility, elegance, etc. traditionally associated with porcelain goods.
—	RHYOLITIC	—	[a.] · Derivative of rhyolite «a fine-grained igneous rock consisting of quartz, feldspars, and mica or amphibole. It is the volcanic equivalent of granite»
—	SANIDINES	—	[n. -S] [Wiktionary - Sense 1] A variety of orthoclase feldspar found as tabular crystals embedded in volcanic rocks. Some forms (called moonstone) exhibit adularescence.
—	ANORTHITES	—	[n. -S] [Wiktionary - Sense 1] A variety of plagioclase feldspar, the calcium endmember of that series.
—	ANORTHITIC	—	[a.] · Derivative of anorthite «a white to greyish-white or reddish-white mineral of the feldspar group and plagioclase series, found chiefly in igneous rocks and more rarely in metamorphic rocks. It is used in the manufacture of glass and ceramics. Composition: calcium aluminium silicate. Formula: CaAl2Si2O8. Crystal structure: triclinic»
—	GRANOPHYRE	S	[n. -S] [Wiktionary - Sense 1] A subvolcanic rock with angular intergrowths of quartz and alkali feldspar.
—	GRANULITES	—	[n. -S] [Wiktionary - Sense 1] A fine-grained metamorphic rock composed chiefly of feldspar, quartz, and garnets.
—	MICROCLINE	S	[n. -S] [Wiktionary - Sense 1] A common feldspar of igneous, plutonic, and metamorphic rocks, made of potassium aluminum silicate, with the chemical formula KAlSi₃O₈.
—	MONZONITES	—	[n. -S] · a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals
—	MOONSTONES	—	[n. -S] [Wiktionary - Sense 1] A translucent gemstone, an orthoclase feldspar, that has a pearly lustre.
—	OLIGOCLASE	S	[n. -S] [Wiktionary - Sense 1] A plagioclase feldspar, the second member of the Albite-Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula. Oligoclase with reddish-golden inclusions found in Norway and Canada is called sunstone.
—	ORTHOCLASE	S	[n. -S] [Wiktionary - Sense 1] Potassium aluminum silicate, KAlSi₃O₈, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.
—	AMAZONSTONE	S	[n. -S] [Wiktionary - Sense 1] A bluish-green variety of microcline feldspar used as a gemstone. The best known occurrences are at Crystal Peak and Pike's Peak in Colorado.
—	ANORTHOSITE	S	[n. -S] [Wiktionary - Sense 1] A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar.
—	FELDSPATHIC	—	[a.] [Wiktionary - Sense 1] Containing feldspar.
—	GRANITELIKE	—	[a.] · Derivative of granite «a light-coloured coarse-grained acid plutonic igneous rock consisting of quartz, feldspars, and such ferromagnesian minerals as biotite or hornblende: widely used for building»
—	GRANOPHYRES	—	[n. -S] [Wiktionary - Sense 1] A subvolcanic rock with angular intergrowths of quartz and alkali feldspar.
—	GRANOPHYRIC	—	[a.] · Derivative of granophyre «a fine-grained granitic rock in which irregular crystals of intergrown~ quartz and feldspar are embedded in a groundmass of these minerals»
—	LABRADORITE	S	[n. -S] [Wiktionary - Sense 1] A plagioclase feldspar mineral, calcium sodium aluminum silicate, often very coarsely crystalline, used as a decorative stone for carvings and building façades.
—	MICROCLINES	—	[n. -S] [Wiktionary - Sense 1] A common feldspar of igneous, plutonic, and metamorphic rocks, made of potassium aluminum silicate, with the chemical formula KAlSi₃O₈.
—	OLIGOCLASES	—	[n. -S] [Wiktionary - Sense 1] A plagioclase feldspar, the second member of the Albite-Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula. Oligoclase with reddish-golden inclusions found in Norway and Canada is called sunstone.
—	ORTHOCLASES	—	[n. -S] [Wiktionary - Sense 1] Potassium aluminum silicate, KAlSi₃O₈, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.
—	PLAGIOCLASE	S	[n. -S] · © a general term used of any triclinic feldspar
—	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~
—	ANORTHOSITES	—	[n. -S] [Wiktionary - Sense 1] A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar.
—	GRANODIORITE	S	[n. -S] [Wiktionary - Sense 1] An intrusive igneous rock similar to granite, but containing more plagioclase than potassium feldspar.
—	LABRADORITES	—	[n. -S] [Wiktionary - Sense 1] A plagioclase feldspar mineral, calcium sodium aluminum silicate, often very coarsely crystalline, used as a decorative stone for carvings and building façades.
—	PLAGIOCLASES	—	[n. -S] · © a general term used of any triclinic feldspar
—	ALUMINOSILICATE	—	[n. -S] [Wiktionary - Sense 1] Any of many silicate minerals, such as feldspar and zeolite, in which a proportion of the Si⁴⁺ ions are replaced by Al³⁺, the excess negative charge being balanced by extra sodium, potassium or calcium ions.

61 entries