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bornite

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Chalcopyrite Specimens
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born⋅ite

  [bawr-nahyt]
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–noun
a common mineral and important ore of copper, copper iron sulfide, Cu5FeS4, occurring in masses, of brownish color when first exposed to the air; peacock ore.
Origin:
1850–55; named after I. von Born (1742–91), Austrian mineralogist; see -ite 1

Related forms:
bor⋅nit⋅ic  [bawr-nit-ik] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Chalcopyrite Specimens
Fine Chalcopyrite Specimens All sizes and price ranges.
obgrocks.com
born·ite   (bôr'nīt')   
n.  A brownish-bronze, lustrous copper ore with the composition Cu5FeS4 that tarnishes to purple when exposed to air.

[After Ignaz von Born (1742-1791), Austrian mineralogist.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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