Meaning of black diamond | Babel Free

Definitions

1. Hematite.
   countable, uncountable
2. Anthracite.
   countable, uncountable
3. Carbonado, a natural diamond that is black in color.
   countable, uncountable
4. A black synthetic diamond, specifically a CVD polycrystalline diamond or HPHT polycrystalline compact diamond.
   countable, uncountable
5. Boron carbide.
   countable, uncountable
6. A member of the new affluent black middle class in South Africa, characterized by conspicuous consumption.
   South-Africa, countable, derogatory, uncountable
7. A symbol representing a steep and relatively difficult trail, typically of a 40% gradient or above.
   countable, uncountable

CEFR level