Ключевые слова: aggregate, alternative, background, bohemia, clear, closeup, cosmic, crystal, czech, czech republic, diamond, expensive, gem, gemmy, gemstone, geology, glass, green, hydrothermal, isolated, jewelry, macro, matrix, meteorite, mine, mineral, mineralogy, moldavite, natural, nature, ore, pattern, precious, rock, rough, sample, south, specimen, stone, tektite, texture, therapy, transparent, uncut, uneven surface, vitreous silica, white, white background,