in the right–hand part – relief effigy of Ignatius Dameika; in the left–hand part – relief effigy of a geological hammer and an inset of a stone similar to dameikit and its chemical formula (on the copper–nickel coin the inset is absent and on its place the relief effigy of mountains is placed); at the bottom in the left–hand part – inscription in four lines "IГНАТ ДАМЕЙКА 1802 1889" (IGNATIUS DAMEIKA 1802–1889); at the bottom in the right–hand part – relief effigy of fragment of mountain chain in Andes, adopted in honor of I. Dameika, and inscription "CORDILLERA DE DOMEYKO".