1. neodymium iron boron, 70,000/ton
2. samarium cobalt, 230,000/ton
3. alnico, 100,000/ton
All are quite valuable haha!
These are estimated by the current price of raw materials prices, there should be an error with the actual situation, only for the owner's reference.
You get this piece of iron lumps can only be recycled, can be sold to the recycling company or a small magnet factory, in any case to discount Oh, you can be estimated at 70% off.
There is another possibility, is a ferrite, which is our common magnet, disconnected section is black. The main component is iron, it would be worthless.
Good luck!