The coal-black sludge is used to fertilize nonfood crops such as cotton.
Sufferers of the disease develop distinctive, coal-black lesions.
Her eyes were large and brown, the long eyebrows were coal black.
The hair—which a few short hours ago had been nearly coal black—was now silvery white.
The horses are coal black, and their eyes flash in the darkness like fire.
His eyes were piercing, and his mustache was coal-black.
