Hello, I am new to making Silver jewellery and I have seen posts already about Silver making skin green. However my problem is that customers that have bought jewellery had no problems from me last year, but advised that the jewellery purchased this year is making their skin green.

My customers are now questioning me as to whether the Jewellery I am selling is Silver. I do assure them all my metal comes from Cooksongold and have invoices.
Has anyone else had this problem with existing customers?