TERMIUM Plus®

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NOIR DIAMANT [3 records]

Record 1 2015-04-21

English

Subject field(s)
  • Economic Geology
  • Mineralogy
  • Ground-Drilling Facilities (Mining)
DEF

Cryptocrystalline material composed of diamond. It is compact, opaque, dark gray to black, lacking cleavage planes and very tough. Usually occurs in rounded masses, but is also found in angular broken pieces. Principal source is the State of Bahia, Brazil, but it occurs occasionally elsewhere in South America and in Africa. It was formerly in demand for diamond-drill bits.

French

Domaine(s)
  • Géologie économique
  • Minéralogie
  • Installations de forage minier
DEF

Variété impure de diamant noir, employé comme abrasif.

CONT

Plusieurs variétés de diamant peuvent être distinguées: 1) le diamant [...] 2) le ballas ou short bort [...] 3) le carbonado, fragments noirs, grenus à compacts, de la grosseur d'un pois et d'aspect de coke.

CONT

Le bort et le carbonado ont des applications [...] importantes pour leur dureté (têtes de forages et abrasif). Ce sont eux qui l'emportent sur le plan industriel.

Key term(s)
  • diamant noir industriel

Spanish

Save record 1

Record 2 2007-03-11

English

Subject field(s)
  • Gemmology
  • Mineralogy
  • Diamond Industry
DEF

An industrial diamond of non-gem quality used to prepare the scaife.

CONT

Bort is a gray to black massive diamond, the colour of which is caused by inclusions and impurities. ... Crushing bort, the lowest grade of diamonds, is crushed in steel mortars and graded into abrasive grits of various sizes.

Key term(s)
  • boor

French

Domaine(s)
  • Gemmologie
  • Minéralogie
  • Industrie diamantaire
DEF

Diamant présentant un défaut, inutilisable en bijouterie et servant d'abrasif.

Key term(s)
  • bortz
  • bowr
  • boor

Spanish

Campo(s) temático(s)
  • Estudio de las gemas
  • Mineralogía
  • Industria del diamante
CONT

El bort se usa para labrar otros diamantes y para perforar la roca en los sondeos.

Save record 2

Record 3 1992-09-29

English

Subject field(s)
  • Ornamental Glassware

French

Domaine(s)
  • Verrerie d'art

Spanish

Save record 3

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