Mervis Diamond Importers 1775 Rockville Pike, Rockville, MD20852 Mervis Diamond Importers is a family business started by Morris and today run by his sons Ronnie and Zed, with the help…More of their children. It was started with honesty and integrity, and the tradition continues today. The Mervis staff has training from the Gemological Institute of America or the Diamond Council of America. Mervis offers a lifetime 100 percent trade-up guarantee, as well as lifetime free cleaning and re-sizing when purchasing Mervis Diamonds. The business also works with customer's insurance companies to make replacing lost and stolen jewelry an easier processes. Mervis has three stores in the Washington D.C. area.