There is a hang tag marked D. Y on one side and 925 D.
An M is a symbol Yurman has used and it's one way you can be sure it's authentic. The diamonds are all there and white and sparkling as they should be. It closes with a lobster claw clasp. It is in excellent condition and I guarantee it's authentic. I do not have the pouch. The item "David Yurman Triple X Diamond Blue Topaz Necklace Sterling Silver 16 Pouch EUC" is in sale since Friday, August 24, 2018. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Necklaces & Pendants\Other Fine Necklaces, Pendants". The seller is "neverpayretailagain" and is located in Glenview NAS, Illinois.This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Philippines, Singapore, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica.