I can't tell you about YOUR cleaner. I just use HSN's cleaner and one I'd bought from QVC. I've never had a problem with my diamonique and their mystery metal.
I will tell you that once I left (for a few weeks) a diamonique ring in the container that held jewelry cleaner and it turned the metal a weird color.
But that's my mistake. I should never have left the ring sitting for weeks in the solution.
Again, I've sprayed the HSN jewelry cleaner and some QVC jewelry cleaner and never had a problem.
I'd suggest you try your's out on a ring (i.e. diamonique) that you never wear, just in case. I wouldn't try it out on some of my favorite pieces if you aren't sure how it will come out.