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 [fĕld́späŕ, fĕĺ-]
Dictionary.com · The American Heritage® Dictionary
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Feldspar - Wikipedia, the free encyclopedia
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The word feldspar literally translates to: feld, meaning field, and spar, meaning "easily cleaved material". It refers to any of several crystalline aluminosilicate minerals found in abundance in the earth's crust.
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Mineral Information on the WEB ... The generic term "feldspar" comes from the Germanic term "feldt spat", meaning "mineral with prominent cleavage from the field". It was a prime constituent of many of the rocks over turned by farmers while plowing their fields.
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Sunstone is a species of plagioclase called "oligoclase" or known sometimes in the jewelry industry as "adventurine feldspar". It gets is shiller in the same way that labradorite does, but the background color is brown to orange, and the composition is full of small hematite crystals that give it additional sparkle.
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Why is feldspar important? ... The feldspars are a family of silicate minerals which occur in igneous rocks. There are many different members to the feldspar group. Obviously, silicon and oxygen form the foundation for the group, but calcium, sodium, and potassium are also present.
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Information on the feldspar mineral group ... Common members of the Feldspar group: ... Feldspar is not a single mineral. It is a group of minerals related to each other in structure and chemical composition. Feldspar minerals are aluminum silicates of either potassium, sodium, and calcium. Several rare members contain...
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Feldspar Occurrences ... Feldspar occurs in igneous, metamorphic and sedimentary rocks and thus can be found throughout North Carolina. It is more commonly found in igneous and metamorphic rocks of the Blue Ridge and Piedmont provinces. Feldspar weathers to kaolin which is the main clay mineral used in ceramics and...
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Britannica online encyclopedia article on feldspar (mineral), any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium. Feldspars make up more than half the Earth’s crust, and professional literature about them constitutes a large percentage of the literature of mineralogy. ... In any case,
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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. Feldspars crystallize from magma in both intrusive and extrusive rocks, and they can also occur as compact minerals, as veins, and are also present in many types of metamorphic rock. ... Print Email Bookmark...
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