Black Diamond may refer to:

In geology:

• Carbonado, a dark polycrystalline diamond.
• A black synthetic diamond, specificaly CVD polycrystalline diamonds or HPHT polycrystalline compact diamonds.
• A colloquial term for coal.
  • Black Diamond (passenger train), named for this

As a person:

• Black Diamond, a Liberian rebel leader.
• Penelope Black Diamond, a German model.

As a city:

• Black Diamond, Alberta, Canada.
• Black Diamond, Florida, United States.
• Black Diamond, Washington, United States.

As a company:

• Black Diamond Cheese Limited, a Canadian cheese manufacturing company.
• Black Diamond Equipment, a manufacturer of climbing and outdoor gear.
• Black Diamond Coal, a coal mining company.
• Black Diamond Strings, manufacturer of guitar strings and accessories.

As a building:

• The Black Diamond building, part of the Danish Royal Library complex.

In music:

• Black Diamond, an album by singer Angie Stone.
• Black Diamond, a song by the rock band KISS.
• Black Diamond, a song by the metal band Stratovarius.

In alpine skiing:

• A black diamond symbol (♦) denotes a difficult ski slope, two black diamond symbols (♦♦) denote a very difficult slope.

Black Diamond