Founded in 1995, Gregory Diamond Company is a supplier of Loose Diamonds and a manufacturer of Diamond Jewelry located on Chicago’s Historic Jewelers Row. We are an American Owned company that is built on honesty, value and trust.  Our mission is now and has always been to offer Fine Diamonds and Diamond Jewelry at great prices. All of our Diamonds are guaranteed to be represented accurately and to be free of any undisclosed treatments. We manufacture all of our own Diamond Jewelry here in the United States and guarantee it to be of the highest  quality and craftsmanship.      Over the last 22 years we have developed relationships with some of the largest diamond manufacturers in the world. This makes us a great partner when you are looking for fine diamonds and diamond jewelry at the lowest prices possible.  If you are in the market to buy or sell a Loose Diamond, Diamond Jewelry or Diamond Earrings please contact us and see what working with an educated, reliable source can do for your piece of mind.