Ключевые слова: aggregate, cluster, crystal, crystalline, cube, cubic, fool, fools gold, gemstone, geological, geology, goethite, gold, golden, healing, hydrothermal, iron, jewelry, matrix, metal, metallic, mine, mineral, mineralogy, mining, nature, nugget, ore, pegmatite, precious, pyrite, rock, sample, silver, specimen, stone, sulfide, sulphide, treasure, yellow,