Hi Steve, you cannot determine whether the diamonds are fake or a girls best friend by the stamps on the metal alone. Some metals like to pretend they're a girl's best friend too. ;-)
YOU HAVE TO TEST THE STONES to determine if the diamonds are fake or "real" diamonds.
There are three ways to go about testing diamonds: 1. Local Jeweler. 2. Diamond testing equipment. Get a model that also identifies moissanite diamonds. 3. A couple of Simple tests that YOU can do at home to help in determining whether the diamonds are fake diamonds or genuine diamonds.
