Ключевые слова: abstract, amethyst, bowels, collection, copy space, crude, crystal, crystal cluster, crystalline, decorative, fossil, fragment, geology, hard, hemimorphite rock, horizontal, macro, macro structure, material, mineral, mineralogy, nature, no people, object, ore, oxide, piece, quartz, rare, raw, rock, rough, sample, science, semiprecious, shade, shiny, specimen, stone, stone material, structure, texture,