An equiaxed magnetite. Those with magnetism are called living magnets or spiritual magnets, and those with extremely weak magnetism are called dead magnets.

Live magnets are irregular blocks or slightly square, with many edges and corners and different sizes. The surface is grayish black, metallic luster, or dull and covered with a small amount of brown to grayish black powder. Heavy, hard, not easy to break, irregular section, gray-black.

Strong magnetism and iron absorption ability. It's fishy and tasteless Dead magnets are irregular, huge, angular and of different sizes.

The surface is reddish-brown to brownish-brown, with metallic luster, covered with a small amount of reddish-brown powder and easily broken. The section is reddish-brown to brownish-brown, often with pores and more impurities. The magnetism is extremely weak and it does not have the ability to absorb iron. It smells like dust and rust.

The color is gray-black, the section is dense and shiny, and it can absorb iron.

False magnet

A mixture of trigonal hematite and limonite.

Irregular block, some edges and corners are not obvious or slightly smooth. The surface is brown to brown, metallic or inconspicuous, and partially smooth. Heavy, hard, not easy to break, the section is granular, and yellow-white or gray-black impurity patches can be seen. No magnetism, no ability to absorb iron. It smells like dirt.