Want to put a 1.54 carat, round diamond, in a four prong Tiffany setting. Girdle is listed on GIA report as "Thin to Medium, Faceted." We've been assured that the diamond will be secure in this setting. Agree?
It would appear from his replies to other threads that Garry does not recommend putting a diamond with a thin girdle in a prong setting. I think others would say that thin to medium is ok. It may depend on just how much of the girdle is thin. He also prefers 6 prongs. If you lose one prong in a 4 prong setting, although they are generally thicker than the prongs in a 6 prong setting, you can lose your diamond. It has happened to people. You can read the thread titled "4 or 6 prong" to see a discussion on this topic.