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bort

 
Dictionary: bort   (bôrt) pronunciation
 
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n.
  1. Poorly crystallized diamonds used for industrial cutting and abrasion.
  2. A carbonado.

[Probably from Dutch boort.]

borty bort'y adj.
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Wikipedia: Bort
 
Home > Library > Miscellaneous > Wikipedia
For other uses, see Bort (disambiguation).

Bort or boart is a term used in the diamond industry to refer to shards of gem-grade/quality diamonds. In the manufacturing and heavy industries, "bort" is used to describe dark, imperfectly formed/crystallized diamonds of varying levels of opacity. The lowest grade, "crushing bort", is crushed by steel mortars and used to make industrial-grade abrasive grits. Small bort crystals are used in drill bits. The Democratic Republic of the Congo provides 75% of the world supply of crushing bort.

References

  • [1] accessed 20 Mar 2005


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Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Bort".  Read more

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