Sotheby’s offers 2 diamonds over 100 carats

New York—Two important diamonds headline the upcoming Magnificent Jewels auction at Sotheby’s New York.

“The Juno Diamond” is a Type IIa, 101.41 carat, D-color, pear-shaped, internally flawless diamond. Sotheby’s estimates it will sell for over $10 million.

Coming from an “important private collection”, according to Sotheby’s, the Juno diamond bears the name of the Roman goddess of light and fertility.

Only 11 diamonds weighing more than 100 carats were auctioned, Sotheby’s said, and seven of them were sold.

Recently, “The Rock”, a 228-carat diamond, raked in nearly $22 million at Christie’s Geneva. It ranks fifth among the most expensive white or colorless diamonds to be sold at auction.

The most expensive was “The Art of De Grisogono, Creation I”, which fetched $33.7 million at Christie’s Geneva in 2017. This stone weighed 163.41 carats.

Not content to be overshadowed by the colorless stone, Sotheby’s also offers a deep orange-brown fancy diamond with a unique setting.

Weighing 111.59 carats, the auction house said ‘The Earth Star’ is the second largest cut and polished brown diamond to come to auction, and one of only three such stones weighing more than 100. carats to have ever been offered for sale.

Salvaged from South Africa in 1967, ‘The Earth Star’ returned to the country in 1971 to celebrate the 100th anniversary of the Kimberley mine. David Webb created the current setting for the stone in honor of its appearance at auction this year.


The stone made an appearance in the 1968 tome “Famous Diamonds” by Lord Ian Balfour.

The rough version – weighing 248 carats – was discovered the previous year in South Africa at the Jagersfontein mine.

Jagersfontein was not known for producing brown diamonds or diamonds of this size. The stone came from 2,500 feet below the surface, deeper than is typical for such a large diamond.

The Baumgold brothers in New York cut and polished the stone into its current pear shape and named it The Earth Star for its brilliance.

In 1983 it sold for almost a million dollars and has remained privately owned until now.

Sotheby’s is offering the diamond without reserve, estimating it will sell for between $1.5 and $2.5 million.

It is the largest diamond that the David Webb workshop in New York has ever mounted. The company put him in a pendant with azure malachite, diamonds and gold, highlighting his origin below the Earth’s surface.

Another view of

Another view of “The Earth Star Diamond” in his David Webb setting with azure malachite, diamonds and gold

Sotheby’s New York Magnificent Jewels sale is scheduled for June 16.

Other highlights include a Type IIa diamond, 26.06 carats, D color, VVS1 clarity, emerald cut diamond set in a ring by Kwiat ($2-3 million); a pair of sapphire and diamond ear clips; ($2 million to $3 million); and a Cartier emerald and diamond necklace ($1.5-2.5 million).

All lots are available for consultation on line.

Sarah C. Figueiredo