Russian cloisonné: fire, glass, and metal.

The word "cloisonné" came into the Russian language from Greek through Byzantium and meant "bright, shining stone." This is how enamel was referred to in Russia, a glass-like substance applied to metal and fixed by firing. At a temperature of about 800 degrees, powdered colored glass melts and turns into a durable, everlasting coating.
Russian craftsmen mastered this technique as early as the 10th-12th centuries. Kyiv jewelers worked in cloisonné enamel: the thinnest gold partitions divided the surface into cells, which were filled with different colors. The Mongol invasion interrupted this tradition, and the secrets of the masters were lost.

The revival came in the 16th-17th centuries. In the workshops of the Moscow Kremlin, in Solvychegodsk with the Stroganovs, and in Veliky Ustyug, cloisonné was used to decorate church utensils, icon frames, bowls, and boxes. The Usolye masters became famous for their bright painted enamel with floral patterns.

The most famous center became Rostov Veliky. From the 18th century, miniatures were painted on enamel here: first icons and details of church decor, then secular portraits, landscapes, and decorations. Rostov cloisonné is recognized for its soft colors, fine detailing, and white enamel background. After the revolution, the craft was preserved by a cooperative that grew into the "Rostov Cloisonné" factory, which still operates today.

Today, cloisonné is not only museum exhibits but also a living craft. Each piece undergoes multiple firings: the master applies paints layer by layer, and one mistake can ruin the entire work. Perhaps this is why cloisonné is so valued: it combines patience, fire, and centuries-old memory of the craft.