Ring with emeralds and diamonds, by Alexander Tenzo, 2019

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Ring with emeralds and diamonds, by Alexander Tenzo, 2019
Ural emerald pendant by Alexey Denisov-Uralsky, Russian, 1914-17
'The present pendant, featuring a rare and exceptionally large Russian emerald from the Ural region, exemplifies Denisov-Uralsky's interest in Russia's native precious stones. The emerald is set in gold and platinum by the Sixth Jewelry Artel of St. Petersburg, and it can be dated to the period of 1914-1917...' ($225,000, 1stdibs)