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schorl

American  
[shawrl] / ʃɔrl /

noun

  1. Mineralogy. a black tourmaline.


schorl British  
/ ʃɔːl /

noun

  1. a black tourmaline consisting of a borosilicate of sodium, iron, and aluminium. Formula: NaFe 3 B 3 Al 3 (Al 3 Si 6 O 27 )(OH) 4

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of schorl

First recorded in 1755–65, schorl is from the German word Schörl

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

La pierre constituante de la montagne d'Oris est en g�n�ral le Kneifs ou la roche feuillet�e mica et quartz � couches plus ou moins ferr�es quelquefois le schorl en roche p�n�tr� de st�atite.

From Theory of the Earth, Volume 1 (of 4) by Hutton, James

The feldspar and the mica, for example, as well as the schorl, are found variously coloured in different granites, and coloured in various proportions.

From Theory of the Earth, Volume 1 (of 4) by Hutton, James

Structurally, therefore, these isles are a continuation of Land's End, but the granite has become less consistent and more friable; it is largely broken into felspar, quartz, and mica, with schorl, chlorite, and hornblende.

From The Cornwall Coast by Salmon, Arthur L. (Arthur Leslie)

We found in it a group of fine crystals of black schorl.

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 by Humboldt, Alexander von

In another place, I found crystals of black schorl radiating from a common centre.

From Volcanic Islands by Darwin, Charles

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