The refined decoration of these cylindrical goblets, slightly flared upwards, is obtained from the contrast between the two bands with a perfectly smooth and polished surface, at the base and the upper edge, and the central part of the body, richly decorated with plant racemes and volutes in nielloed silver that stand out against a rough golden background, created through dense chisel patterning. Moscow was one of the major production centers of niellated objects as confirmed by the provenance of the two glasses in question, made by a silversmith whose name has not been handed down, but whose initials AK are found on numerous objects produced between 1835 and 1849 which show precise executive and decorative affinities with the two Coronini pieces. The niello, an ancient technique which consists in filling the grooves engraved on a metal surface with a dark colored mixture, composed of silver, copper, lead and sulfur in variable proportions, was widely used by Russian goldsmiths and silversmiths since the tenth century, giving life to a tradition that reached its apogee in the sixteenth century, but which still continued to express itself in works of great originality in the nineteenth century.