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.


* [] accessed 20 Mar 2005

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  • bort — bort …   Dictionnaire des rimes

  • bort — [ bɔr ] n. m. • 1867; angl. bort ou néerl. boort; o. i. ♦ Techn. Diamant présentant un défaut, inutilisable en bijouterie et servant d abrasif (⇒ égrisée). ⊗ HOM. Bord, bore. ● bort ou boart nom masculin (peut être néerlandais boort, ou anglais… …   Encyclopédie Universelle

  • bort — s.n. Diamant brut cu structură fibroasă şi cu luciu, întrebuinţat ca abraziv. – Din fr. bort. Trimis de valeriu, 13.09.2007. Sursa: DEX 98  bort s. n. Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  BORT n. Diamant de calitate… …   Dicționar Român

  • borţ — BORŢ, borţuri, s.n. (reg.) Pântecele femeii gravide. – et. nec. Trimis de valeriu, 13.09.2007. Sursa: DEX 98  borţ s. n., pl. bórţuri Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  BORŢ borţuri f …   Dicționar Român

  • bort — s.m.inv. ES fr. {{wmetafile0}} TS mineral. varietà impura e opaca di diamante utilizzata nella lavorazione delle pietre dure come abrasivo | scarto del taglio del diamante {{line}} {{/line}} DATA: 1950. ETIMO: forse dall ant. bort bastardo , cfr …   Dizionario italiano

  • Bort — Bort, n. Imperfectly crystallized or coarse diamonds, or fragments made in cutting good diamonds which are reduced to powder and used in lapidary work. [1913 Webster] …   The Collaborative International Dictionary of English

  • Bort — der; [e]s, e <aus engl. bort »Diamantabfall, splitter«> aus kugeligen ↑Aggregaten bestehender Diamant, der oft als Schleifmittel verwendet wird …   Das große Fremdwörterbuch

  • bort — waste diamonds, small chips from diamond cutting, of unknown origin, perhaps related to O.Fr. bort bastard …   Etymology dictionary

  • bort — bȍrt m DEFINICIJA vrsta dijamanta ETIMOLOGIJA engl. bort …   Hrvatski jezični portal

  • bort|y — «BR tee», adjective. of or resembling bort …   Useful english dictionary

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