How to identify the natural stone and the stone
Best answerIs it through the experiment? Yes, there are a lot of ways.1 take a small amount of solution, add a small amount of iron powder, if there is no copper precipitation, the reaction is complete.
I think it can not be judged by color, because ferrous sulfate also has color, see color is not obvious
You can also see the iron there is no surplus, through the experiment
