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| WikiPedia definition of "feldspar" |
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Feldspar is the name of a group of rock-forming minerals which make up as much as 60% of the Earth 's crust. [1] Feldspars crystallize from magma in both intrusive and extrusive ...
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From the Simple English Wikipedia, the free encyclopedia that anyone can change
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Plagioclase is a very important series of tectosilicate minerals within the feldspar family. Rather than referring to a particular mineral with a specific chemical composition ...
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Orthoclase (endmember formula K Al Si 3 O 8) is an important tectosilicate mineral which forms igneous rock. The name is from the Greek for "straight fracture," because its two ...
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Perthite is used to describe an intergrowth of two feldspars: a host grain of potassium-rich alkali feldspar (near K-feldspar, KAlSi 3 O 8, in composition) includes exsolved ...
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... comprises the communities of Althorpe, Bathurst Station, Bells Corners, Bolingbroke, Bolingbroke Siding, Brooke, Christie Lake, DeWitts Corners, Elliot, Fallbrook, Feldspar, Glen ...
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The alkali feldspar group are those feldspar minerals rich in the alkali elements potassium and sodium. The alkali feldspars include: albite, anorthoclase, microcline, orthoclase ...
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USS Feldspar (IX-159), a concrete barge designated an unclassified miscellaneous vessel, was the only ship of the United States Navy to be named for feldspar.
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Granophyre (pronounced /ˈgrænoʊfaɪr/, from granite and porphyry) is an igneous rock that contains quartz and alkali feldspar in characteristic angular intergrowths such as ...
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The plagioclase feldspar oligoclase also produces moonstone specimens. Its name is derived from a visual effect, or sheen, caused by light reflecting internally in the moonstone from ...
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