RK & Co. specializes in purchasing diamonds and precious colored stones (rubies, emeralds, sapphires, alexandrite, etc.). Our GIA (Gemological Institute of America) trained gemologist has all of the necessary skills, expertise, and equipment to accurately provide those who want to sell diamonds with a fair price.

When making a loan against or selling diamonds or colored stones, it is crucial to bring GIA certification (for diamonds) and AGL certification (for gemstones) if possible. Not only will this streamling the diamond buying process, but it will also help maximize the amount RK Co. Jewelers will pay.

Our diamond buyers look forward to seeing your diamonds and colored stones!


RK & Co. specializes in purchasing and making loans against engagement rings and wedding bands. Whether you have a six figure Harry Winston stunner, or a more modest band, our GIA certified gemologist has the tools and expertise to assist those who wish to sell diamonds and engagement rings. When coming into RK Co. Jewelers, we request that you bring in any certification or paperwork you might have, particularly in the case of signed rings (Tiffany & Co, Cartier, Graff, Chopard, etc.). When working with our diamond buyers, you can rest assured that your prized possessions are safe and that your loan is completely confidential.  RK Co. Jewelers is also one of the best places to purchase bridal jewelry at prices typically reserved for dealers in the trade.

On occasion, we may request that you leave your items with us for further evaluation and authentication.

Other Assets We Accept:

Our beautiful showroom in Alpharetta, GA is convenient as it’s a short distance from areas including Atlanta, Buckhead, Buford, Canton, Cumming, Dahlonega, Dawsonville, Duluth, Dunwoody, Gainesville, Johns Creek, Milton, Roswell, Sandy Springs, Woodstock and Vinings.