Current Diamond Council of America President and CEO Terry Chandler is set to retire in January 2026.
Emerald with Ties to Catherine the Great Headed to Christie’s
The 76-carat gemstone is headlining the auction house’s Magnificent Jewels Geneva sale next month.

Geneva—Emerald is the birthstone for the month of May and, fittingly, next month an emerald with a spectacular provenance will be available at Christie’s.
Headlining Christie’s Magnificent Jewels sale in Geneva this May is an emerald and diamond sautoir, the origin of which can be traced to Catherine the Great of Russia.
According to Christie’s, the emerald was a part of Russia’s imperial jewelry collection for over 100 years, though not in its current form.
The 75.61-carat pear shaped Colombian stone was once a 107.67-carat rectangular-shaped emerald. Its first known owner was Catherine the Great, who possessed the stone at some point in her lifetime until her death in 1796, when it began making its way through the royal family.
In 1874, Alexander II gave the emerald to his son Grand Duke Vladimir Alexandrovich of Russia’s new wife, Grand Duchess Vladimir, born Duchess Marie of Mecklenburg-Schwerin.
The Grand Duchess Vladimir is believed to have been in possession of one of the largest private jewelry collections of the early 20th century. She was born in 1854 and died in 1920, when her collection was dispersed among her children.
Her son, the Grand Duke Boris, received all of the Grand Duchess Vladimir’s emeralds, including the 107.67-carat emerald, which he sold to Cartier in 1927.
It was Cartier that mounted the stone into a diamond pendant and hung it from a diamond necklace that famous gemstone dealer and lapidary Raphael Esmerian had acquired from the Payne Whitney family.
RELATED CONTENT: Aquamarine Fabergé Tiara Heads to AuctionBased on Esmerian’s advice, Cartier re-cut the stone to its current 75.61-carat pear shape in 1954 to improve its clarity, before re-mounting it into a diamond pendant setting and again stringing it from the Payne Whitney diamond necklace, which it lengthened.
John D. Rockefeller Jr. purchased the finished piece of jewelry that year, and it later re-surfaced at auction in Switzerland in 1971, when Esmerian acquired the piece for CHF 430,000.
Now, the emerald has re-emerged on the auction scene from a family’s private collection, with a new and more contemporary diamond setting.
The Imperial Emerald of Grand Duchess Vladimir is
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