I cut and polished this cab myself and it will make a wonderful centerpiece for your jewelery creations. It has and excellent polish and will work wonderfully in a bezel setting. There is one small area on the edge where the stone is not polished and is in it's natural state. I left it this way because if I cut it out it would have made the stone slightly smaller (perhaps 5-10 cts) and it will be covered by the bezel anyway. This rare material is extremely hard and durable (I've dropped cabs on cement from 5 ft while cutting with no chips!) So, no it's not a chip in the stone, that's just how I made it. I have a few more cabs I've cut of this rare material, so if that little imperfection is a deal breaker, convo me and I may have another cab that suits your taste. Supplies from this location are quite limited ( I only got a couple of rough stones from my friend) so don't miss out!