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. // A scattering of round-brilliant cut diamonds shows off the many reflecting facets. ... A selection of gemstone pebbles made by tumbling rough rock with abrasive grit, in a rotating drum. ... Mortar and pestle Mortar used to pulverise plant material with liquid nitrogen A mortar and pestle are two tools used in conjunction with each other to grind and mix substances. ... An abrasive is usually a material that is used to smooth, machine, or, in some cases, roughen another softer material through extensive rubbing. ... Drill bits are cutting tools used to create cylindrical holes. ...
The typical bort occurs in small spherical masses, of greyish colour, rough or drusy on the surface, and showing on fracture a radiate crystalline structure.
In trade, the term bort is extended to all small and impure diamonds, and crystalline fragments of diamond, useless as gem-stones.
This bort is crushed in steel mortars to form diamond powder, which is largely used in lapidaries' work.
Bort, John H. The Milwaukee Journal Sentinel; 7/26/2000; 115 words; Bort, John H. Wednesday, July 26, 2000 Bort, John H. Found peace July 24, 2000, age 53.
He is survived by his wife of 45 years, Agnes (Messina) Bort; several brothers and sisters and many nieces and nephews.
Borts, Theresa H. The Milwaukee Journal Sentinel; 4/6/2001; 24 words; Borts, Theresa H. "Tess" Friday, April 06, 2001 Borts, Theresa H. "Tess" Services pending.
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