Good rare set.

The Diamond Fund is a unique collection of gems, jewelry and natural nuggets, which are stored and exhibited in the Kremlin Armoury in Russia. The Fund was opened in 1967 and its collection dates back to the Russian Crown treasury instituted by Emperor Peter I of Russia in 1719. It is a part of Moscow Kremlin Museums. The gem collection of Peter I, established in 1719, was later stored in the Diamond Chamber  in the Winter Palace. All succeeding monarchs added their contributions to the Chamber. A 1922 study by Alexander Fersman identified 85% of all exhibits to be from 1719–1855, to emperors Peter I through Nicholas I, and only 15% attributed from the last three emperors. Catherine the Great exhibited a particular interest for expensive rocks, even naming her stallion "Diamond." The Diamond Fund received more contributions from her than any other monarch. Preservation, sales and looting of Imperial treasures after the Russian Revolution of 1917 are a matter of controversy and speculation. The Imperial collection was moved from Saint Petersburg to Moscow during World War I; the Soviet Diamond Fund was officially established in 1922. The treasure was first exhibited to the public in November 1967. Originally a short-term show, it became a permanent exhibition in 1968. During the late Soviet period, the value of the Fund's collection was estimated to be $7 billion.