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hornblende

American  
[hawrn-blend] / ˈhɔrnˌblɛnd /

noun

  1. a dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate.


hornblende British  
/ ˈhɔːnˌblɛnd /

noun

  1. a black or greenish-black mineral of the amphibole group, found in igneous and metamorphic rocks. Composition: calcium magnesium iron sodium aluminium aluminosilicate. General formula: (Ca,Na) 2.3 (Mg,Fe,Al) 5 Si 6 (Si,Al) 2 O 22 (OH) 2

"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

hornblende Scientific  
/ hôrnblĕnd′ /
  1. A common, green to black mineral of the amphibole group. It has a variable composition and occurs in monoclinic crystals with a hexagonal cross-section, in fibrous forms, or in granular forms. Hornblende is found in many metamorphic and igneous rocks. Chemical formula: (Ca,Na) 2-3 (Mg,Fe,Al) 5 (Al,Si) 8 O 22 (OH) 22 .


Other Word Forms

Derived Forms

Etymology

Origin of hornblende

From German, dating back to 1760–70; see origin at horn, blende

Vocabulary lists containing hornblende

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.

Hornblende, so common in hypogene rocks, or those commonly called "primary," is rare in modern lava; nor does it enter largely into rocks of any age in which augite abounds.

From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Lyell, Charles, Sir

Hornblende schist also occur and a compact felspathic rock in the Suris defile.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

Hornblende and primitive greenstone are found in the vicinity of Adam’s Peak and in the Pussellava district.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" by Various

Hornblende and augite are two widely distributed minerals, which are so similar in composition and properties that they may be considered together.

From Elements of Agricultural Chemistry by Anderson, Thomas

Hornblende, in blocks, was scattered along the beach, and, wherever decomposed, it yielded fine glittering black sand, so heated under the noontide sun as to burn the naked foot.

From The Highlands of Ethiopia by Harris, William Cornwallis

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