Hey Flashboy,
If your diamond is VS2 or lower, you can have the jeweler set your diamond up in the microscope in the same position as the plot on your certificate and you can match all the inclusions. They are like a fingerprint. Once you have done that, let them set the diamond without the pressure of you standing over them. Some of these guys don't do very good when you are watching them. When the diamond is set, polished and clean, you can have the jeweler set the ring up in the microscope with the diamond oriented in the same direction and you can check it out yourself again. You can also check and see if it has been nicked, chipped or anything else.