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  • Mindat Mines, Minerals and More

    Welcome Mindat is the world's largest open database of minerals, rocks, meteorites and the localities they come from. Mindat is run by the not for profit Hudson Institute of Mineralogy.

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  • Cordi233;rite Wikip233;dia

    Historique de la description et appellations Inventeur et 233;tymologie. La cordi233;rite fut d233;crite par le min233;ralogiste Lucas en 1813. Elle est d233;di233;e 224; l'ing233;nieur, g233;ologue et min233;ralogiste fran231;ais Louis Cordier qui en a fait la premi232;re description sous le nom de dichro239;te ; les 233;chantillons provenaient du Cap de Gattes en Espagne qui n'a pas 233;t233; retenu comme gisement topotype.

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  • Soil

    A typical soil is about 50% solids (45% mineral and 5% organic matter), and 50% voids (or pores) of which half is occupied by water and half by gas. The percent soil mineral and organic content can be treated as a constant (in the short term), while the percent soil water and gas content is considered highly variable whereby a rise in one is simultaneously balanced by a reduction in the other.

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  • Geonieuws index Mineral Collectors Page

    Geonieuws index. zoeken in oude jaargangen van Geonieuws Rubrieken De index van Geonieuws, het tijdschrift van de Mineralogische Kring Antwerpen, is alfabetisch geordend volgens titel en onderverdeeld in volgende rubrieken.

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  • Leafing Through Early Interstellar Ideas Centauri Dreams

    Although John Jacob Astor IV did many things in his life as a businessman, builder, Spanish American War veteran and financier his place in history was secured with his death on the Titanic in 1912.

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  • Igneous rocks sandatlas

    Carbonatite is a real stranger in the igneous world. It can be volcanic or plutonic, but the most striking thing is its composition. Unlike other igneous rocks which are mostly composed of silicate minerals, this one is compositionally close to limestone and marble, hence the name which refers to its carbonate composition.Such exotic igneous rocks have their very own classification principles.

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  • Shale

    Texture. Shale typically exhibits varying degrees of fissility, breaking into thin layers, often splintery and usually parallel to the otherwise indistinguishable bedding plane because of the parallel orientation of clay mineral flakes. Non fissile rocks of similar composition but made of particles smaller than 0.06 mm are described as mudstones (1/3 to 2/3 silt particles) or claystones (less

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  • Recent Advances in Understanding the Geology of Diamonds

    Gems amp; Gemology Gems amp; Gemology, Winter 2013, Vol. 49, No. 4 Recent Advances in Understanding the Geology of Diamonds. Steven B. Shirey and James E. Shigley

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  • Department of Earth amp; Climate Sciences Faculty

    Updated by John Monteverdi / 9/10/18 / montever@sfsu.edu. Jason Gurdak well sampling with students. Graduate students Forrest Horton, Bill Hassett, and John Sommerfeld planning geologic sampling of Himalayan granites, northwest India.

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  • Excalibur Mineral Corporation Current List

    Current List Each month, we offer an abbreviated selection of minerals from our inventory of over 200,000 samples. If you don't see what you're looking for here, or on our Recent Catalogs pages, or on our Rare Species lists, please request a special quote by mail, email, fax or telephone.Be specific as to mineral name and preferred size.

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