Her dress, black as coal, caught everyone's attention at the party.

The painter mixed several coal blacks to achieve the perfect depth of shadow on the canvas.

During the age of steam, coaling stations dotted the coastlines, supplying fuel to every passing warship and merchant ship.

During the field trip, the geology students carefully documented the coal balls exposed in the peat bed.

The factory disposed of several barrels of coal oils following the inspection.

The mining company conducted surveys to evaluate the thickness and quality of the coal beds before applying for permits.

As a coal cracker, he knew every local mine and the stories behind them.

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

A coal tit flitted through the pines, its tiny black cap and white nape flashing as it searched for insects.

The mining team discovered a thin coal bed beneath the shale layer.