Bort

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.

In select parts of England, the word "bort" can be used to replace "bear" (e.g. I spy a grizzly bort) though this is uncommon and not dialect specific.