black diamond

English

Noun

black diamond (countable and uncountable, plural black diamonds)

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

Coordinate terms

(skiing):

• green circle
• blue square
• bunny hill

Derived terms

• (skiing): double black diamond

See also

• ♦ (Unicode black diamond)