a widely occurring iron oxide ore; a mixture of goethite and hematite and lepidocrocite
例句
用作名词 (n.)
Their colors are also generated after the formation of jadeite crystals, often found in the red layer, caused by disseminated limonite. 它们的颜色也是硬玉晶体生成后才形成,常常分布于红色层之上,是由褐铁矿浸染所致。