Ключевые слова: ammonite, ancient, archaeology, biology, calcite, carbonate, close up, collectible, cretaceous, curvature, detail, discovery, ecology, education, evolution, exhibit, extinct, fossil, geological, history, invertebrate, jurassic, macro, marine, mollusk, museum, natural history, nature, nautilus, ocean life, ornamental, paleontology, pattern, petrified, prehistoric, preservation, rare, relic, research, sediment, sedimentary, shell, specimen, stone, study, texture, treasure, underwater, zoology,