Fake gems, substandard gold, used ring from Overstock.com
I purchased a 14K white gold and diamond ring for my wife for our 30th anniversary. It looked strange so we took it to a jeweler. 2 diamonds were fake, the white gold was so poor in quality that it tested initially as copper (there was no 14K stamp on the inside of the ring), and the jeweler showed us the ring was used and damaged.