Custom Made Coins for SMRI. The Solution Mining Research Institute (SMRI) is a research and educational organization focused on solution mining. This custom made coins for SMRI features the words of "SMRI" and their logo on one side and U.K. symbol in the center on the flip side. Our custom made coins for SMRI are antique silver plated, hand filled with bold enamel colors to make it a truly beautiful piece. Each coin is packaged in a plastic sleeve for added protection.