a widely occurring iron oxide ore; a mixture of goethite and hematite and lepidocrocite
造句
用作名詞(n.)
Their colors are also generated after the formation of jadeite crystals, often found in the red layer, caused by disseminated limonite. 它們的顏色也是硬玉晶體生成后才形成，常常分布于紅色層之上，是由褐鐵礦浸染所致。