United PMR’s Coloured silver alloys?

Greetings everyone,

Recently I have been eyeing united precious metals coloured silver alloys. Which has 10-60 percent silver content the rest I am assuming to be some combination of copper and zinc as the company rightly pledges not to use noxious elements such as cadmium. Has anyone worked with these metals? I assume the would have a very non precious attitude but some intrinsic value due to thier precious metal content. I am considering working with these as they look like quite frivolous and fun metals to work! I can’t seem to find much about them though and am interested in hearing if anyone has any thoughts about these alloys in general. Interested in hearing everyone’s input.

ArgentumMoon