I have been buying diamonds from Nadis for over 20 years. My nephew was getting engaged and wanted me to make him the engagement ring. I told him the first thing, was to buy a good diamond. We went to see Stephan, the owner of Nadis. He found a 1ct center stone. GIA diamond E color and SI-1 in clarity. A Great stone. He gave me an unbelievably good deal on that diamond. I finished the ring and am posting a picture of the ring. I highly recommend Nadis if you need anything in the jewelry industry or if you are buying a diamond. I personally wont go to anyone else.