Etymology :modification of obsolete German Feldspath , from G Feld field + obsolete German Spath spar. Pronunciation :'fel(d)-"spär. Function :noun. Date :1772.
| feldspar | One of the predominant naturally occurring fluxes used primarily in stoneware glazes The three most commonly used feldspars are Potash feldspars K2O Al2O3 6SiO2, Soda Feldspars Na2O Al2O3 6SiO2 and Lithium Feldspars Li2O Al2O3 8SiO2 Feldspars can be the only flux present in a stoneware glaze although this is uncommon and additions of calcium usually supplement it | en | |||
| feldspar | A large group of minerals that is found in a wide area of the earth, but only a few of its members, including moonstone, is suitable for gemstones | en | |||
| feldspar | a varying stone deposit used as a flux in terracotta bodies and glazes | en | |||
| feldspar | One of the most important glaze materials It is used in almost all glazes, and in high-fired glazes it is often the principal material and provides the principal flux Feldspar is made up of (a) an alkaline portion consisting of sodium, potassium, or calcium, singly or in combination; (b) alumina; and (c) silica | en | |||
| feldspar | A light colored crystal with a complex silicate composition, common in basaltic lavas | en | |||
| feldspar | an ingredient of clay | en | |||
| feldspar | any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium | en | |||
| feldspar | A large group of rock-forming minerals that, together, make up about 60% of the earths outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks | en | |||
| feldspar | 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 | en | |||
| feldspar | They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so | en | |||
| feldspar | The colors are usually white or nearly white, flesh-red, bluish, or greenish | en | |||
| feldspar | (Also called felspar) A crystalline substance found in granite | en | |||
| feldspar | Complex of silicates that make up bulk of the earth’s crust | en | |||
| feldspar | A group of common aluminum silicate minerals that contains potassium, sodium, or calcium | en | |||
| feldspar | A group of aluminium-silicate rock-forming minerals They are the most abundant minerals in the Earth's crust | en | |||
| feldspar | A mineral found in granite and other rocks, probably the most common mineral found in granite Its color is derived from the mineral with which it is in conjunction | en | |||
| feldspar | any of a group of abundant rock-forming minerals occuring in igneous, sedimentary, and metamorphic rocks and consisting of silicates of aluminum with potassium, sodium, and calcium - BACK>> | en | |||
| feldspar | a type of grey or white mineral (feldspath, from feld + spath type of mineral). Any of a group of aluminosilicate (containing aluminum and silicon) minerals that also contains calcium, sodium, or potassium. Feldspars are the most common minerals in the Earth's crust and are the major component in nearly all igneous rocks found on the Earth, on the Moon, and in some meteorites. They also are common in metamorphic and some sedimentary rocks. Their complex chemical and structural properties make them useful for interpreting the origins of rocks. Natural feldspars can be divided into alkali and plagioclase feldspars | en | |||
| feldspar | A group of abundant rock-forming minerals of the general formula, MAl(Al,Si)3O8 Feldspar are the most widespread of any mineral group and constitute 60% of the earth's crust; they occur in all types of rock Feldspar are white and grey to pink and have a hardness of 6 | en | |||
| feldspar | A group of minerals that are made up of Silicon, Oxygen plus various metals such as Aluminium, Calcium and Potassium | en | |||
| feldspar | A variety of minerals found in igneous rocks They consist mostly of silicates of aluminum combined with some other minerals, so they vary in their chemical composition crystalline form and color GANTAD | en | |||
| feldspar | -Aluminosilicates of potassium, sodium and calcium, and characterised by two cleavages at nearly right angles They are among the most important constituents of igneous rock | en | |||
| feldspar | An important rock-forming silicate mineral, it is compositionally (K,Ca,Na)(Al,Si)1-3O8 | en | |||
| feldspar | A common mineral occurring in igneous rocks that sometimes erodes out and becomes incorporated into sedimentary rocks Feldspar is the most common mineral in the world | en | |||
| feldspar | any of a group of alumino-silicates (Mineralogy) isim | en | |||
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