Coal is easily seen as black.
Limestone is usually gray.
Coal has no real features to it.
Limestone has shells, and other things.
LImestone and coal are different because of their outcomes. Limestone , after the cementing, becomes a rock. Coal, after the pressing together, becomes a fossil.
Bituminous coal and limestone are mined in Indiana.
Chalk is a type of limestone. Limestone and coal are both organic sedimentary rocks.
Coal. Limestone.
limecoal
the limestone helps to stop explosions in the coalmines ...
limestone and coal
Coal and limestone.
Coal and Limestone.
Paleozoic
Limestone and coal are two important organic rocks.
Coal, limestone, and granite.