On the front side of the coin there is a relief image of the State Emblem of the Russian Federation, there are inscriptions: "RUSSIAN FEDERATION", "BANK OF RUSSIA", face value - "25 РУБЛЕЙ" and date - "2017", metal designation according to the Periodic System of Elements DI . Mendeleyev, a sample of the alloy, the trademark of the St. Petersburg Mint and the mass of the precious metal in its purity.

On the reverse side of the coin there are relief images of the portrait of K.A. Tone and the Grand Kremlin Palace against the backdrop of the silhouette of the architectural ensemble of the Red Square, to the left of the portrait there is an inscription in three lines - "KONSTANTIN ANDREYVICH TON" and a caption made in color.

252 reefs

From the front and back sides of the coin around the circumference there is a protruding edge.