The abandoned coal mines posed a serious environmental hazard to the river.

After the campfire, she gathered the black coals to keep the embers alive.

Old miners along the estuary recalled finding channel coal in thin seams that split like shale and burned with medium smoke, a yellow flame, and a sulfurous smell.

We sat around the hibachi, toasting marshmallows over buckwheat coals and sharing stories late into the night.

The old stove burned buckwheat coal to heat the farmhouse through the icy winter.

The geologist picked up a piece of glance coal and examined its bright sheen under the lamp.

The coal-smoke from the factory hung low and heavy over the river at dawn.

The aging coaling station by the harbor was converted into a museum detailing the era of steam-powered ships.

The old miner claimed that the stove burned hotter when fueled with dice coal.

After the storm, the delivery truck scattered kennel coals across the muddy yard, and we spent the afternoon gathering them into buckets.