Definitions for black diamond

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Random House Webster's College Dictionary

black′ dia′mond(n.)

  1. Category: Mineralogy

    Ref: carbonado1. 1

  2. black diamonds, coal, esp. anthracite.

    Category: Mineralogy

Origin of black diamond:

1910–15

Princeton's WordNet

  1. carbonado, black diamond(noun)

    an inferior dark diamond used in industry for drilling and polishing


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