In June of this year, my (now) husband proposed with a beautiful ring purchased from Zales. The center diamond was certified and there was a warranty (on the diamonds only!) purchased also. The ring is 18K white gold with a 1/2 carat center diamond and small round accent diamonds. After just a few weeks, I noticed that when I turned my hand palm up, the "white" gold was yellowish. I never said anything, figuring I may have caused a chemical reaction cleaning at work due to exposure to glass/surface cleaner or bleach. However, my... read full review »