Wiktionary
black coals
n. (black coal English)
Usage examples of "black coals".
His usually mobile ears did not betray his agitation, but his eyes burned like black coals.
When you see the black coals rise to the surface of the water, clap your hands and shout aloud, for soon after that sign I shall return to you with some tender meat.
We will give you white earth and black coals which you will grind together to make black paint, and we will give you white sand, yellow sand, and red sand.
For the blue paint you will take white sand and black coals with a very little red and yellow sand.
I could feel her eyes like black coals in the dark as she looked at me.