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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.

See Examples For:

Sometimes the red schorl occurs only in dendritic crystals of a bright red.*

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 by Ross, Thomasina

I observed neither hornblende, black schorl, nor rutile titanite, in this granite.

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

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

On its northern slope is a vast mass of schorl, the celebrated Roche Rock.

From Nooks and Corners of Cornwall by Scott, C. A. Dawson

Among these black schorl or tourmaline, actinolite, zircon, garnet, and fluor spar are not uncommon; but they are too sparingly dispersed to modify the general aspect of the rock.

From The Student's Elements of Geology by Lyell, Charles, Sir

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