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2825 Sand Hill Rd
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Stephen Silver is renowned for our extraordinary ability to procure, design and handcraft the world's finest jewelry and gemstones.

The Stephen Silver Fine Jewelry Estate Collection includes some of the finest pieces from the Edwardian, Victorian, Art Deco, Art Nouveau, and Retro eras. Signed and period pieces are the company's specialty; many of which are from prestigious jewelry houses such as Cartier, Van Cleef & Arpels, Bulgari, Tiffany & Co., and Harry Winston.

The Stephen Silver Fine Jewelry Signature Collection exemplifies modern day luxury combined with old world elegance to produce true works of art. Exquisitely handcrafted in platinum and 18-karat gold, using only the very finest diamonds and colored gemstones, our Signature Collection is exceptional in quality and extraordinary in style.

Auction Headliner 'The Sky Blue Diamond' Fetches $17.1M at Sotheby's Geneva


Auction Headliner 'The Sky Blue Diamond' Fetches $17.1M at Sotheby's Geneva

Annena Sorenson

"The Sky Blue Diamond" — the highly touted headliner of Sotheby's Magnificent Jewels and Noble Jewels sale — fetched $17.1 million in Geneva yesterday. The hammer price was in the lower range of the pre-sale estimate of $15 million to $25 million.


At $2.13 million per carat, the performance of the square-cut, 8.01-carat Sky Blue Diamond was lukewarm compared to other high-profile blue diamonds that have captivated gem lovers over the past year.


“The Blue Moon of Josephine,” for example, established a new record for the highest price paid per carat for any gemstone when the hammer went down at Sotheby’s Geneva exactly 12 months ago. The internally flawless, 12.03-carat, cushion-shaped, fancy vivid blue diamond sold for $48.5 million, or $4.03 million per carat.

In May of this year, “The Oppenheimer Blue” became the most expensive gem ever auctioned when it sold for $57.5 million at Christie’s Geneva. The fancy vivid blue, step-cut, rectangular-shaped diamond weighed 14.62 carats and earned a clarity rating of VVS1. Its price per carat was $3.96 million.

Sotheby's had high hopes for The Sky Blue Diamond due to its mesmerizing Fancy Vivid Blue color. Had it sold at the top of the estimated range, it would have yielded $3.12 million per carat and earned a place among the finest fancy vivid blue diamonds of all time.

David Bennett, Worldwide Chairman of Sotheby’s International Jewelry Division, offered this pre-sale description of the stone: “The Sky Blue Diamond is of a wonderfully clear celestial blue, presented in an extremely elegant square emerald cut – in my view, the most flattering of all the cuts for a colored diamond. This important gem will, I am sure, captivate all collectors of exceptional gemstones.”


The Sky Blue Diamond, which has a clarity rating of VVS1 and a purity rating of Type IIb, is set in a ring by Cartier. The geometric design is accented with brilliant-cut and baguette diamonds.

Its Fancy Vivid Blue designation by the Gemological Institute of America (GIA) is the highest possible color grading — a distinction awarded to fewer than 1% of all blue diamonds submitted to the GIA.

Credits: Images courtesy of Sotheby's.