This 16.9-carat, step-cut, type IIa, D color, internally flawless diamond sold to a private buyer for $1.8 million at Bonhams New York Fine Jewelry Sale this week.

New York--A 16.9-carat diamond ring garnered $1.8 million at Bonham’s New York Fine Jewelery Sale Tuesday, falling at the lower end of its pre-sale estimate of $1.6 to $2.2 million.

A private U.S. buyer bought the step-cut, type IIA, D color, internally flawless diamond.

Susan Abeles, head of jewelry for Bonhams U.S., said of the stone: “This is one of the finest examples of a diamond there is, given its rarity, color, cut, clarity and transparency. It was admired widely during our previews in New York, L.A., Geneva and Hong Kong and the diamond was extraordinarily charming.”

Fine jewelry from the personal collection of Gigi Guggenheim Danziger, whose husband owned Cartier for four years, also was part of the auction, including many signed Cartier pieces.

Highlights from the 32 Danziger lots included a Cartier diamond necklace with three rectangular-shaped diamonds serving as its focal point, with round brilliant-cut diamonds set throughout, which fetched $37,500.

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A Cartier ruby and diamond brooch, with the center diamond weighing 4.24 carats, garnered $46,000. Danziger wore it to the London premier of “The Godfather.” It was an anniversary present from her husband.

20170830 Ruby brooch

Danziger’s Cartier sapphire and diamond brooch went for $37,500. It featured a cushion-shaped modified step-cut sapphire, weighing approximately 7.10 carats, surrounded by marquise and pear-shaped diamonds.

20170830 Sapphire brooch

Several Kashmir sapphires fetched high prices at Bonhams Fine Jewelry sale, including a 5.33-carat cabochon sapphire ring by Stephen Russell that also featured old European cut diamonds. The sapphire had no indications of heat or clarity enhancement. An online buyer paid $235,000 for the piece.

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A cushion-shaped, mixed-cut sapphire weighing 5.30 carats and framed by a halo of old European cut diamonds, sold for $230,000. The no-heat sapphire was only expected to fetch between $100,000 and $150,000.

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Similarly, an emerald ring made a splash at the auction, garnering $235,000. It featured an oval-shaped, modified brilliant cut 7-carat Colombian emerald flanked by similarly cut fancy vivid yellow diamonds weighing 1.09 carats and 1.04 carats.

20170830 Emerald ring

Signed jewelry was also a hit with buyers, with a sapphire and diamond clip brooch by Oscar Heyman fetching $87,500 and an enamel and glass Medusa pendant by Rene Lalique selling for $69,500.

And, in what was possibly the most interesting lot of the bunch, a circa 1900 diamond, emerald and ruby brooch purchased at a garage sale for $8 in Ohio five years ago sold for $26,000 after a round of competitive bidding both in the room and over telephone.

Abeles concluded: “We had a really interesting sale this September, which featured the best diamonds you could buy, several Kashmir sapphires and some wonderful and extremely rare pieces of jewelry from the Art Nouveau and Art Deco periods. These all performed very strongly at the auction along with signed jewelry from names such as Cartier, Oscar Heyman and Raymond Templier. It was notable to see that collectors form all over the world participated in the auction.”

The full results of the sale are available to view on Bonhams website.

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