the inside of a lot of the links started to look more like the finish was rubbing off than like the copper ...
Within about 3 weeks, the inside of a lot of the links started to look more like the finish was rubbing off than like the copper was naturally reacting to my skin.  The copper-polishing cloth from my jeweler brought no results, although it does well with copper pins that I have.  After 4 weeks of wearing it - with no discernible benefit - I stopped wearing it.  It may work for some people; but this one did not work for me - and, the &#34;black&#34; (not &#34;greening&#34; - but black) on the inside of many links showed up on the clasp, and made it look pretty cheap.
Rating: 2 stars