I would say this depends on the brand. Most jewelers can be trusted not to engage in stone-switching but it can happen and does. It is good to know what the inclusions in your diamond look like-you can always make sure that the jeweler shows you what yours look like under a microscope and that they match your lab grading report before you leave your diamond and then again afterwards. Look at it this way. It doesn't detract from the diamonds look, or its value, it does offer some identification.
Most people do enjoy knowing they have an easy way to ident their own diamond.
He knew how particular I am about diamonds and just liked it better than any of the others he was shown. He said he took the tray outside and the EightStar just stood out. I have to go see some over at Jonathan's Goodoldgold business. I've heard so much about the awesome color disply. I'm just curious because I've heard so much about them.