Ключевые слова: ardent, blue, bright, brimstone, burn, chemical, chemistry, cinder, close, colorful, crisp, crust, crystal, crystalize, crystallized, crystallography, crystals, earth, education, educational, elements, erosion, fire, flame, flare, formation, gem, geologic, geological, geology, geothermal, glisten, glitter, lava, light, match, mineral, minerals, other, pattern, perish, phenomenon, pink, quartz, r ice, rock, rystalline, shining, sience, sparkle, stone,