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Schorl |
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schorl [shȯrl]
(mineralogy) Schorl a mineral, a black ferruginous variety of tourmaline with isomorphic admixtures of magnesium, manganese, and trivalent iron (seeTOURMALINE). Schorl is found in granites, pegmatites, greisens, skarns, gneisses, hydrothermal veins, and various metamorphic shales. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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