Keegan and Company is Atlanta's premier diamond broker and direct diamond importer. They boast the largest inventory of GIA certified diamonds in Atlanta, and therefore are sure to have whatever it is you're looking for in a diamond. Whether you're buying for your own anniversary, an engagement, or just treating yourself, you absolutely cannot go wrong with Keegan and Company. Call for a price quote, or make an appointment to stop by and see how they can help you find something brilliant.. Keegan & Company,located in the new Sovereign building has the largest inventory of loose diamonds in Atlanta. They have been doing business in the heart of Buckhead for over eighteen years. Their pledge: Diamonds weighing one carat or more will only be sold with Gemological Institute of America reports; the highest standard for grading in the diamond industry. In addition all diamonds will be evaluated in accordance to Keegan & Company's own strict standards.