Hi Again, I posted a request on cleaning the green of Afghani jewelry and then I read some tips from tribal jewelry tribe and the one that worked best is apple cider vinegar. I tried it on a not so special pendant first to see how it worked and the green came off like magic. I dipped a cotton swab into the vinegar and dabbed the pendant until it was clean. I also found it is best to wear gloves while cleaning as the green transferred onto my fingers. Now I just need to figure out how to clean my coin and jewelry bra without getting vinegar on the underneath fabric.