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schorl
[ shawrl ]
noun
- Mineralogy. a black tourmaline.
schorl
/ ʃɔːl /
noun
- 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
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Derived Forms
- schorˈlaceous, adjective
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Word History and Origins
Origin of schorl1
First recorded in 1755–65, schorl is from the German word Schörl
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Word History and Origins
Origin of schorl1
C18: from German Schörl, origin unknown
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Example Sentences
This is more especially true of chlorite, schorl, hornblende and augite.
From Project Gutenberg
The exterior parts of the veins consist of a bluish quartz, very compact, and uniformly containing a great deal of Schorl.
From Project Gutenberg
Greisen is closely connected with schorl rock both in its mineralogical composition and in its mode of origin.
From Project Gutenberg
In the tourmaline granites prisms of black schorl occur either singly or in stellate groups.
From Project Gutenberg
On its northern slope is a vast mass of schorl, the celebrated Roche Rock.
From Project Gutenberg
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