因此推测，这种“黑胆石”样品为一种人造磁性材料铁酸锶，而不是市场上人们所说的赤铁矿或乌钢石。

It is black and has strong magnetism, which is called "hematite" or "goethite" by traders.

youdao

因此推测，这种“黑胆石”样品为一种人造磁性材料铁酸锶，而不是市场上人们所说的赤铁矿或乌钢石。

It is black and has strong magnetism, which is called "hematite" or "goethite" by traders.

youdao