I was concerned because in the picture it states professional and shows different jewelry pieces. My jar that came showed a diamond ring and didn't say professional on the jar. I called the company and they stated that it was indeed for silver which is why I wanted this brand. On the jar it states various stones and metals. I used it on my sterling silver earrings and they came out very nicely. I then put my 18 kt white and yellow gold diamond16 year wedding ring in the solution and it came out beatiful as well as my husbands...sparkling. Bottom line I do recommend.