>>60906716
>a problem with the slide i think is copper slides the same as silver
Yes, copper is pretty close to silver with the magnet test. You can use the specific gravity test to confirm, copper is much less dense than silver
Copper = 8.96 g/cm3
Silver = 10.49 g/cm3
https://youtu.be/xw-2kqjtEdI

You need an accurate scale, some fishing line, some kind of adjustable stand and a suitable water container. There are charts if you don't want to do the math.