What are these tiny little letters and numbers? Why are they there? What do they mean? Hallmark research can be one of the most fun (or most frustrating) parts of the job as we put on our white gloves and survey the crime scene...
It's true: Diamonds are the hardest of all gems, ranking 10 out of 10 on the Mohs Scale of Hardness. They're more resistant to scratches than any other gem, but that doesn't mean they're invincible.