Ключевые слова: collection, crystal, crystalline, fools, gem, gemstone, geological, geologist, geology, gold, golden, iron, isolated, little, material, metal, metallic, mineral, mineralogy, natural, nature, nugget, object, ore, ornamental, pebble, pyrite, rare, raw, research, rock, sample, science, shine, shiny, shooting, specimen, stone, surface, texture, textured, white, yellow,