那些有棱角的，黑色的磁铁矿一般都是黑色的，这种矿石是地球上最为常见的磁性矿石。
The angular, black magnetite—the most common naturally occurring magnetic material on earth—is always black, however, and is frequently found near garnet.
这种矿石有轻微的磁性。
通过化验就可以确定矿石性质，基本的化验有全铁品位、磁性铁含量。
Through tests can determine the ore properties, basic tests have full iron grade, magnetic iron content.
区内沉积岩和花岗岩磁性微弱或无磁性，与硼矿密切相关的矽卡岩及硼矿石中磁铁矿含量较高。
The sedimentary rocks and granite in the region are of very weak or no magnetism, while the boron ore and skarn with close relation to boron mineralization are of quite high content of magnetite.
结合矿石化学分析和镜下鉴定结果，证实闪石类矿物与磁性铁有着密切关系。
Combined with the chemical analysis and the microscopic identification results, it is confirmed that amphibole minerals have a close relationship with magnetic iron.
矿石工业类型为需选弱磁性铁矿石，主要成因类型为磁铁黑云片岩型、磁铁变粒岩型。
Its industrial types of ore bodies are weak magnetic type which should be chosen. Its ore-forming types are magnetic biotite schist and magnetic granulite type.
矿石工业类型为需选弱磁性铁矿石，主要成因类型为磁铁黑云片岩型、磁铁变粒岩型。
Its industrial types of ore bodies are weak magnetic type which should be chosen. Its ore-forming types are magnetic biotite schist and magnetic granulite type.
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