Feldspar - Wikipedia, the free encyclopedia
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Feldspars (KAlSi 3 O 8 - NaAlSi 3 O 8 - CaAl 2 Si 2 O 8 ) are a group of rock-forming tectosilicate minerals which make up as much as 60% of the Earth's crust. Feldspars crystallize fro...
en.wikipedia.org/wiki/Feldspar
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Feldspar is used as bonding agent along with magnesium oxide, magnesium chloride and other synthetic glue in the manufacture of abrasives, wheels, discs and other shapes. ... Feldspar is of widespread occurrence and is mined in almost all countries. Feldspar is generally used for three purposes...
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www.mineralszone.com/minerals/feldspar.html
www.mineralszone.com/minerals/feldspar.html
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Encyclopedia article about feldspar. Information about feldspar in the ... although other colors are found, and are used in the making of porcelain and as a ...
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encyclopedia2.thefreedictionary.com/feldspar
encyclopedia2.thefreedictionary.com/feldspar
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Apatite resembles the green emerald but is rarely used as a gemstone because it is much softer. There are four varieties of Felspar used as gem stones. And Moonstones are a variety of Felspar that has a vitreous lustre and they are found principally in Sw ... Apatite, which is seldom used as a gem stone,
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www.jjkent.com/articles/apatites-felspar-moonstones.htm
www.jjkent.com/articles/apatites-felspar-moonstones.htm
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+ 297 Calcineda Felspar (material used in ...; + 300 Raw flint (material used in the manu...; + 301 Raw flint (material used in the manu...; + 302 Fire-clay, fired (material used in t...; + 2677 Chemical sample. ... + 296 Raw Feldspar (material used in the m...; + 297 Calcineda Felspar (material used in ...; +
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www.powerhousemuseum.com/collection/database/?irn=13660
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Hours and charges ... + 297 Calcineda Felspar (material used in ...; + 300 Raw flint (material used in the manu...; + 301 Raw flint (material used in the manu...; + 302 Fire-clay, fired (material used in t...; + 2677 Chemical sample.
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www.powerhousemuseum.com/collection/database/?irn=1575
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Felspar is much used in the manufacture of porcelain by reason of its fusibility. In England the material employed is mostly orthoclase from Scandinavia, often known as " Swedish spar." The high translucency of " ivory porcelain " depends on the large proportion of felspar in the body.
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www.1911encyclopedia.org/Felspar
www.1911encyclopedia.org/Felspar
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Pure felspar is colourless, but the mineral is usually white, yellow, red or green. Certain felspars are used as ornamental stones on account of their colour (see AMAZON.STONE). Other felspars are prized for their pearly opalescence (see ... , like aventurine (see SUN-STONE). Felspar is much used in the manufacture of...
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www.jcsm.org/StudyCenter/Encyclopedia_Britannica/FAT_FL...
www.jcsm.org/StudyCenter/Encyclopedia_Britannica/FAT_FLA/FELSPAR_or_FELDSPAR.html
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Apart from Blue john another 13 varieties of Felspar are to be found in this cave.) Treak cliff, on the other hand has numberous stalagtites and interesting mineral deposits.) The Peak-Speedwell System is Derbyshire's longest cave.
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www.rockcollector.co.uk/editorial1106.htm
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