1) Crystal-like mineral 2) Crystalline mineral 3) Felspar 4) Igneous rock constituent 5) Mineral in glassmaking 6) Monoclinic mineral 7) Orthoclase or albite 8) Spar
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1) Felspar 2) Gemstone 3) Moonstone 4) Oligoclase 5) Orthoclase 6) Plagioclase 7) Plagioclastic
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Feldspars crystallize from magma as veins in both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar (see below) is known as anorthosite. Feldspars are also found in many types of sedimentary rock. ==Etymology== The name feldspar derives from the ...
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• (n.) Alt. of Feldspath
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any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium. Feldspars make up more than half the Earth`s crust, and ... [15 related articles]
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Plagioclase feldspar Any of a group of rock-forming, aluminosilicate (containing aluminum and silicon) minerals that also contain one or two of the following metals: calcium, sodium, potassium, and, rarely, barium. Potash feldspars, principally orthoclase and microcline, are potassium aluminum ...
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Feldspars are the most abundant of the rock forming minerals. They can be found in most igneous and metamorphic rocks.
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Any of a group of crystalline minerals, all silicates of aluminum with either potassium, sodium, calcium, or barium. An essential constituent of nearly all crystalline rocks.
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A mineral group consisting of silicates of aluminum and one or more of the metals potassium, sodium, or calcium. Examples: K-feldspar, Ca-plagioclase, Na-plagioclase.
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A group of crystalline minerals that consist of aluminum silicates with either potassium, sodium, calcium, or barium and that are an essential constituent of nearly all crystalline rocks.
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A group of common aluminum silicate minerals that contains potassium, sodium, or calcium.
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Feldspar or felspar is a name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta. They occur in crystals and crystalline masses, vitreous in lustre, and breaking rather easily in two directions at right angles to each other, or nearly so. The colour...
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Aluminum silicate minerals that make up as much as 60% of the Earth's crust. Two main types of feldspar are alkali feldspars that incorporate sodium and potassium, and plagioclase feldspars that generally incorporate calcium.
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Any group of crystalline minerals, all silicates of aluminum with either potassium, sodium, calcium, or barium. An essential constituent of nearly all crystalline rocks.
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(Also called felspar). A crystalline substance found in granite.
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[
n] - any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
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See under soil type. Floor type Next to climate and grape variety, one of the most important factors influencing the quality of wine. The different soil types have developed over millions of years through physical and chemical weathering of rocks and through humification of organic matter. During physical weathering, natural forces such as win...
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A group of rock-forming minerals that make up about 60% of the Earth's crust.
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felspar noun any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
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Any of a group of silicate minerals. Feldspars are the most abundant mineral type in the Earth's crust. They are the chief constituents of igneous rock and are present in most metamorphic and sedimentary rocks. All feldspars contain silicon, aluminium, and oxygen, linked together to form a framew...
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A group of common rock-forming minerals that includes microcline, orthoclase, plagioclase and others.
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a common mineral in igneous and some metamorphic rocks.
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[Difficult words] any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
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[Obscure words] any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
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