Ключевые слова: abstract, background, beautiful geology, beauty, blue agate, closeup, crack, crystal, detail, druse, gem, gems, gemstone, geologists, geology, industry, isolated, layer, light, macro, macro photography, material, mineral, mineralogy, minerals, mining, natural, nature, nugget, pattern, precious, reaction, rock, schist, semigem, semiprecious, sheet, silica, slice, smooth, soaprock, stone, stones, structure, surface, talcum, texture, textured, white,