Ключевые слова: abstract, background, beautiful, beauty, blue, calcium, celestine, celestite, closeup, collection, crack, crystal, detail, druse, gem, gems, gemstone, geologists, geology, industry, isolated, light, macro, madagascar, material, mineral, mineralogy, minerals, mining, natural, nature, pattern, precious, raw, rock, semiprecious, set, sheet, shiny, slice, smooth, stone, stones, structure, surface, texture, textured, white,