Ключевые слова: birthstone, chalcedony, chlatedony, crystal, crystalline, crystals, fossil, gemological, gemology, gemstone, geological, geology, gray chalcedony, hydrothermal, hydrothermal rock, hydrothermal stone, jewel, material, mine, mineral, mineralogical, mineralogy, mining, ore, ornamental stone, precious, quartz, quartz rock, raw, raw quartz, rock, rough, sarder, semiprecious, semiprecious stone, silica, slice, sparkle, stone, structure, surface, texture, translucent, transparent, treasure, unpolished, unpolished chlatedony, untreated chlatedony, white chalcedony, yellow chalcedony,