Bort
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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, boart, or boort 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 or 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
- Carbonado (black diamond)
- Synthetic diamond
- Ballas
References
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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. Archived from the original on 2015-04-25.
- ↑ industrial diamond. Encyclopædia Britannica
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