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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:

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

From Volcanic Islands by Darwin, Charles

The former of these is an aggregate of schorl, or tourmaline, and quartz.

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

Greisen is closely connected with schorl rock both in its mineralogical composition and in its mode of origin.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" by Various

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

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

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