black diamond

1. (countable, uncountable)Hematite.

2. (countable, uncountable)Anthracite.

3. (countable, uncountable)Carbonado, a natural diamond that is black in color.

4. (countable, uncountable)A black synthetic diamond, specifically a CVD polycrystalline diamond or HPHT polycrystalline compact diamond.

5. (countable, uncountable)Boron carbide.

6. (South Africa, countable, derogatory, uncountable)A member of the new affluent black middle class in South Africa, characterized by conspicuous consumption.

7. (countable, uncountable)A symbol representing a steep and relatively difficult trail, typically of a 40% gradient or above.

1. Black diamonds sparkled in the light of the jewelry store.

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