The Sienna Star An Exceptional 73ct Fancy Vivid Yellow Diamond and Diamond Ring to go under the hammer at Sotheby's New York

Lot 91, The Sienna Star, represents a culmination of Spiro’s oeuvre, embodying the relentless pursuit of the world’s finest gemstones with an artistically daring and innovative design. At over 73 carats, the diamond represents one of the largest Fancy Vivid Yellow diamonds to ever come to auction, and it is, in the GIA’s words, “a standout item in the extraordinary world of gemstones.” The ring itself adds a masterful aesthetic. With intricately set pave diamonds and a flexible shank, it complements the central diamond perfectly, creating a piece of truly wearable art.

Glenn Spiro’s unrelenting quest for superlative stones—and his unwillingness to settle for less than the best—started early. The East Londoner grew up in a working-class family and left school at 15 to work as a goldsmith’s apprentice at English Artworks, Cartier’s workshop in London. 

After designing for other houses for nearly 25 years, Spiro established his own house, G, in 2014, on Mayfair’s Bruton Street. He quickly established himself as an artist whose designs are at once contemporary and timeless, and always set with exceptional stones.

Courtesy: Sotheby's