Bidspirit auction | Glass Beaker. Russian Empire, 1830s

Glass Beaker. Russian Empire, 1830s - Glass BeakerRussian Empire, 1830sCobalt glass, silver and gilt paintingDimensions: 8.5 x 7.5 cm.A cylindrical beaker with a cannelated lower section, decorated with large bouquets and floral sprigs executed in gold over a silver ground. The rich cobalt tone combined with the shimmering metallic ornamentation reflects the opulent decorative style of Russian glassmaking in the early 19th century, when floral gilding was often used to enhance the depth and brilliance of colored glass.Cobalt, or blue glass – also known as smalta – is produced by adding cobalt compounds (such as cobalt oxide or cobalt carbonate) to molten glass. Cobalt is a highly concentrated coloring agent, and only a very small amount is needed to achieve its deep, saturated hue.