Hi, List;

I am going to try to make some colloidal copper. Iwent to the health food 
store, and bought two MagneLyfe Copper rope bracelets.  On the package, it said 
it was made from 100% pure polished copper.
    My question is: can I trust this? Would this copper be good enough to make 
colloidal copper from?
    If not, what is a good source of "pure" colloidal copper?

Again, thanking all responses in advance.

                    Carl George