"Black gold" is a term used for petroleum.
CHARCOAL
Black gold is a term that refers to crude oil or petroleum. When people would discover oil on their property, it usually made them rich, so it was like finding gold.
An awesome pair of Adidas gold/black sweats.
In my opinion, I think gold
Gold or Silver or Diamond --------------------------------- Rubies.
Franklin Wixson has written: 'The Black Hills gold mines' -- subject(s): Gold mines and mining, Description and travel, Mining law
Red
There are several species that could fit that description, consult a field guide.
Tan, red, silver, gold, black...
Black and gold are two very suitble colours to go with any occasion.
E. H. Saltiel has written: 'Black Hills guide' -- subject(s): Gold discoveries, Description and travel
Since black gold is oil, yes there is black gold in the world.