The paper displays brief review of the Congress program, contents of scientific reports and the chronicle of organizational arrangements carried out by the XII Congress of the Russian Mineralogical Society (RMS). These data include information about winners of the RMS photography competition «MicroGeo 2015», Russian discoverers of new minerals in 2015, results of the election of the Scientific Council and the Presidium of RMS. The final resolution of the Congress and official resolutions of the RMS Scientific Council are published.