Bort
For other uses, see Bort (disambiguation).
 |
Look up bort in Wiktionary, the free dictionary. |
A mixture of bort and gem diamonds (larger inclusions) from the Crater of Diamonds State Park
Bort-like heavily twinned diamond from Congo
Bort or boart is a term used in the diamond industry to refer to shards of non-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.[1][2]
See also
References
 |
Wikisource has the text of the 1911 Encyclopædia Britannica article Bort. |
- ↑ Spear, K.E; Dismukes, J.P. (1994). Synthetic Diamond: Emerging CVD Science and Technology. Wiley–IEEE. p. 628. ISBN 0-471-53589-3.
- ↑ industrial diamond. Encyclopædia Britannica
This article is issued from Wikipedia - version of the Wednesday, July 22, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.