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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

Derived 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.

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

The granite is dark red, often inclosing veins of quartz, crystallized and compact, and likewise well-formed crystals of schorl.

From On the Old Road, Vol. 2 (of 2) A Collection of Miscellaneous Essays and Articles on Art and Literature by Ruskin, John

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

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

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