Ключевые слова: abstract, acute, angle, background, black, cave, chemical, clear, cold, crisp, crystal, crystalline, crystallography, dark, deposit, design, diamond, discover, gem, gems, geologists, geology, geomorphology, grotto, gypsum, ice, jewel, jewelry, karst, light, limpid, macro, macro photography, mine, mineral, minerals, mining, natural, nature, precious, quartz, rock, salt, science, silica, speleology, stone, texture, topaz, transparent,