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Icon: Saint Basil the Great

With a gilded silver oklad, dated 1829, unknown master N.N, Moscow. With semi-precious stones in the halo.

A silver cover is called Riza (robe) or Oklad. Such metal covers were generally added to show honor to an icon. But in the case of silver and even gold covers, they were also an advertisement of the wealth of a family. Many times such covers are artistic works in themselves.