Ключевые слова: abstract, background, black, boulder, carbon, chunk, coal, copyspace, cracked, dark, display, earth, element, energy, formation, fossil, fuel, geological, geology, grey, hard, heavy, industrial, isolated, jagged, light, material, mineral, minimalist, mining, natural, object, power, raw, rock, rough, shadow, slate, solid, stone, strong, studio, surface, texture, white,