The Government of Canada’s terminology and linguistic data bank.

BALLAS [1 record]

Record 1 1998-02-04


Subject field(s)
  • Mineralogy
  • Gemmology

A hard, spherical aggregate of many very small diamond crystals, usually cryptocrystalline, arranged radially and more or less concentrically around a central point. Because of their structure, ballas are classed as industrials, which are occasionally used in diamond-drill bits and other diamond tools. Also incorrectly used as a name applied to rounded, single-crystal forms of diamond.


  • Minéralogie
  • Gemmologie

Variété de bort.


Plusieurs variétés de diamant peuvent être distinguées: 1) le «diamant» [...] 2) le «ballas» ou «shot bort», masses sphériques, irrégulières, fibroradiées; 3) le «carbonado» [...]


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