Bort
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'''Bort''' or '''boart''' is a term used in the [[diamond]] industry to refer to shards of [[Gemstone|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 [[mortar and pestle|mortar]]s and used to make industrial-grade [[abrasive]] grits. Small bort crystals are used in [[drill bit]]s. The [[Democratic Republic of the Congo]] provides 75% of the world supply of crushing bort.
==References==
* [http://www.idai.org/idaibulletin/edited/diamonds.htm] accessed 20 Mar 2005
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[[Category:Diamond]]
[[lv:Borts (minerāls)]]
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[[ru:Борт (алмаз)]]
[[uk:Борт (мінералогія)]]