Ключевые слова: anthracite, artifact, ash, black, black coal, black diamond, burning, calorific, campfire, carbon, charcoal, coal, cost, dark, ember, energy, energy resource, environment, fire, fossil, fossil fuels, fuel, full, geology, hard, hard coal, heat, industrial, industry, inferno, material, mine, miner, mineral, mineral resources, mineralogy, mining industry, natural, natural resource, nugget, pile, power, resource, rock, rough, shaft, stone, stone coal, texture, textured,