black diamond

(redirected from black-diamond)
Also found in: Thesaurus, Encyclopedia.

black diamond

n.
1. See carbonado2.
2. black diamonds Coal.

black diamond

n
1. (Minerals) another name for carbonado2
2. (usually plural) a figurative expression for coal

black′ dia′mond


n.
2. black diamonds, coal, esp. anthracite.
[1910–15]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.black diamond - an inferior dark diamond used in industry for drilling and polishing
adamant, diamond - very hard native crystalline carbon valued as a gem
References in periodicals archive ?
It's kind of unfortunate that a lot of people go elsewhere in Southern California and ski what they consider black-diamond runs at other mountains and think they can ski black diamonds here,'' said Mount Baldy ski patrolman Patrick Richardson.