schorl
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schorl
(shôrl)n.
Tourmaline, especially black tourmaline.
[German Schörl.]
schor·la′ceous (shôr-lā′shəs) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
schorl
(ʃɔːl)n
(Minerals) a black tourmaline consisting of a borosilicate of sodium, iron, and aluminium. Formula: NaFe3B3Al3(Al3Si6O27)(OH)4
[C18: from German Schörl, origin unknown]
schorˈlaceous adj
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Noun | 1. | schorl - black tourmaline tourmaline - a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones |
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