中国发现的钴矿含锰量高，因此呈现出较弱的蓝灰色。
Cobalt ores found in China have a high manganese content, which produces a more muted blue-gray color.
含锰的花岗岩土层，表层多孔使排水性良好。
Granite with manganese. Porous top layer provides good drainage.
花垣型高磷锰矿为我国一大类型锰矿。该类型锰矿含锰品位低，含磷高。
High phosphorus manganese ore of Huayuan style is a kind of low manganese and high phosphorus contained ore.
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