black diamond

noun

Definition of black diamond

1 :dense black hematite
2 black diamonds plural :coal 3a

Recent Examples of black diamond from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'black diamond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of black diamond

1763


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