What should I do when the jewelries I purchased are fake?

This is a pretty simple case.  If you the jewelry was sold as real diamonds, rubies, etc. and now you have iron-clad proof it is fake, then you should have an easy case against the jeweler.  Since it seems so easy there must be something I am missing. Maybe they are claiming you switch the real jewelery for fakes yourself.  Also, you do not say when this happened.  If it has been one year since you discovered the fraud and you have done nothing, you will need to explain such a long delay.  If it just was discovered that different. I suggest you call my office so you can provide necessary details including the amount you paid.