(as) black as coal (as) black as coal Completely black; totally without light or color.
The streak color of coal is usually brownish-black or black.
Coal is black under standard conditions.
Brown coal, also known as lignite, has a lower carbon content and higher water content than black coal, also known as bituminous coal. This makes brown coal less efficient as a fuel source compared to black coal. Additionally, brown coal is typically found closer to the Earth's surface, while black coal is deeper underground.
Coal is typically black or dark brown in color.
Black
Anthracite is a form of coal, coal is primary carbon, and carbon is black.
coal
Black coal is a type of coal that is dark in color and is primarily composed of carbon. It is commonly used as a fuel source for generating electricity and in industrial processes due to its high energy content.
as black as coal means that something is very very very very dark black
Simile: as black as coal.
Coal can range in color from black to dark brown, depending on its carbon content and impurities. High-quality coal tends to be black, while lower quality coal can appear as a darker brown.
Petroleum is often referred to as "black gold" because of its economic value and significance as a highly sought-after natural resource. Coal is not typically referred to as black gold.