单词	magnetite
释义	magnetite /ˈmaɡnɪtʌɪt / noun [mass noun] A grey-black magnetic mineral which consists of an oxide of iron and is an important form of iron ore.The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.... The sample is composed of K-feldspar, plagioclase and quartz with accessory apatite, magnetite, titanite, zircon and secondary epidote. Along the contact zone the limestones were recrystallized into a cloudy white, massive calcite containing grossular, epidote, magnetite, quartz, and tremolite. Origin Mid 19th century: from magnet + -ite1.
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