Diamond Exchange USA specializes in buying diamonds .75 ct. and larger. Not only do we pay the highest amount for your diamonds, we also provide the smoothest transaction available. We are located across the street from White Flint Mall. We will give cash that day for your jewelry. We've been in business since 1992 and our experience and integrity are unmatched. Also, we are considered Washington DC's premier gold and diamond buyers. We have GIA Graduate gemologists on staff whose sole purpose are grading stones. Sending your diamond to a stranger is an unusual and uncomfortable thing to do so it's important to know as much possible not only a about the company you're dealing with but the people you'll be working with. So if you have any questions, don't hesitate to ask. Please call or email us today. .