nosean
nosean A feldspathoid mineral and member of the sodalite group Na8[Al6Si6O24]SO4, where it is closely related to haüyne; sp. gr. 2.3–2.4; hardness 5.5–6.0; cubic; grey, white, or greenish, often with light-blue tinges; vitreous lustre; crystals, when present, rhombododecahedra, but it is also massive; cleavage poor, rhombodo-decahedral; occurs in extrusive alkaline undersaturated (see SILICA SATURATION) igneous rocks such as nosean leucitophyres and phonolites.
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Cancrinites , haüyne A feldspathoid and member of the sodalite group of minerals, formula (Na,Ca)4–8(Al6Si6O24)(SO4,S)1–2; sp. gr. 2.5; hardness 5.5; greyish-white… Rock salt , halite (rock salt) Mineral, NaCl; sp. gr. 2.2; hardness 2.5; cubic; perfect cubic cleavage; colourless, white, or shades of yellow, red, and blue; wh… Natrolite , natrolite Member of the zeolite group of minerals, with the formula Na2Al2Si3O10.2H2O; sp. gr. 2.2; hardness 5.0; white; massive, fibrous, or crystal… Corundum , corundum Mineral, Al2O3; sp. gr. 3.9–4.1; hardness 9; trigonal; the two main varieties blue and green, but can be yellow, or brown to almost black, a… Hard Rock Cafe International Inc , Hard Rock Cafe International, Inc.
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Web site: http://ww… Wollastonite , enstatite (En) An important orthorhombic pyroxene (orthopyroxene, or opx) Mg2Si2O6 and end-member of an isomorphous series, the other end-member bein…
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nosean