Have been wearing this ring for a year and it fooled the jeweler.  My husband wanted me to get the real thing but I don't want to spend $15,000.00 for a ring comparable in size and worry about losing it.  I have other cz's that clouded over after a short time and the metal discolored quickly.  This ring looks great after a year of constant wearing.  I don't remove my rings so they are in and out of water and in the hot tub and this ring continues to sparkle.  I ordered two more as backups in case I lose this for any reason. If you want something that looks great and sparkles like crazy this is the ring to have.