Auctions

Sotheby’s to Auction Mellon Family Jewelry

AuctionsMay 30, 2023

Sotheby’s to Auction Mellon Family Jewelry

Signature pieces from Cartier and David Webb will appear in the June jewelry auction.

Constance “Connie” Barber Mellon’s David Webb Elephant Clip-Brooch
From the collection of Constance “Connie” Barber Mellon comes this 1965 David Webb Indian elephant clip-brooch featuring rubies, emeralds, diamonds, and white enamel. It will be up for auction June 8 at Sotheby’s New York alongside other jewelry owned by the Mellon family.
New York—Sotheby’s announced recently that jewelry belonging to two prominent women in the Mellon family, the influential Pittsburgh family that founded Mellon Bank, will appear at auction this summer.

The selection of 11 pieces comes from the collections of Constance Prosser Mellon and her daughter Constance “Connie” Barber Mellon and will be offered at the “Magnificent Jewels” auction in New York on June 8.

“Comprising exceptional colored stones and jewels from esteemed houses and designers such as Cartier and David Webb, the Mellon collections exemplify extraordinary quality and timeless elegance,” Sotheby’s said.

The sale takes place almost 10 years after Sotheby’s auctions of “The Collection of Mrs. Paul (‘Bunny’) Mellon” in 2014, where a 9.75-carat fancy vivid blue diamond was the top lot, setting two world auction records.

“Like Bunny Mellon, Constance and Connie were staples in society with legacies to match. Considered to be ineffably glamorous, the mother-daughter duo were praised for being ahead of their time in the world of fashion and jewelry, and this is expertly demonstrated in their collection of bold, yet timeless, designs,” said Catharine Becket, head of Sotheby’s Magnificent Jewels auctions in New York. 

“It is a privilege not only to present these exquisite jewels from their personal collection to the world, but also to shine a spotlight on their philanthropic endeavors throughout their lifetime.”

From the collection of Constance Prosser Mellon, a Cartier trio is up for sale.

The first offering is a 1950s Cartier necklace featuring five Kashmir sapphires, weighing a total of approximately 34.95 carats, and accented by round, baguette, and square-cut diamonds.

Sotheby’s calls the design “a fascinating illustration of Cartier’s design evolution in response to the fashion of the times … the shortened choker a noted departure from the longer, draped necklaces of the Art Deco period.”

Popular in its era, Elizabeth Taylor owned a similar style necklace accented with rubies and diamonds.

The pre-sale estimate is $2.5 million to $3.5 million.

Constance Prosser Mellon’s Cartier sapphire and diamond necklace
The Cartier sapphire and diamond necklace set with five Kashmir sapphires accented by diamonds. (Photo courtesy of Sotheby’s)


Following the necklace is a Cartier three-stone sapphire and diamond ring.

The piece is a family heirloom Sotheby’s said was “adored and cherished by the matriarchs of the Mellon family for decades.”

The center stone, flanked by two baguette diamonds, is an emerald-cut Burmese sapphire that is royal blue in color, weighs 33.51 carats and has no indication of heating, according to the auction house.

Its pre-sale estimate is $1.5 million to $2.5 million.

Constance Prosser Mellon’s Cartier sapphire ring
The Cartier ring featuring an emerald-cut Burmese sapphire weighing 33.51 carats with no indications of heating and accented by baguette diamonds. (Photo courtesy of Sotheby’s)


“Three-stone rings like this one are classic Cartier designs, heavily favored by jewelry collectors such as the illustrious Princess of Grace of Monaco, whose diamond engagement ring from 1956 was in a similar style,” Sotheby’s said.

The last ring in the trio is a 9.90-carat emerald-cut Colombian emerald and diamond ring. Sotheby’s described the emerald as being of “exceptional clarity” and “relatively free of inclusions.”

It is estimated to sell for $150,000 to $250,000.

Constance Prosser Mellon’s Cartier emerald ring
The Cartier ring featuring an emerald-cut Columbian emerald weighing approximately 9.90 carats and accented by baguette diamonds. (Photo courtesy of Sotheby’s)


Constance Prosser Mellon married Richard King Mellon in 1936.

Following the death of his father in 1933 and his uncle Andrew Mellon in 1937, Richard was entrusted with the future of the family businesses, Mellon Bank and Union Bank, which he consolidated into Mellon National Bank and Trust Co.

Constance Prosser Mellon
Constance Prosser Mellon (Photo courtesy of the Mellon Family, Sotheby’s)


The same year he took over the family business, Richard founded the Richard King Mellon Foundation, naming his wife as its chair of the board of trustees. 

Influenced by the couple’s love and dedication to Richard’s hometown of Pittsburgh, as well as the outdoors, The Foundation was focused on regenerating Pittsburgh and the surrounding areas, as well as on conservation, donating “considerable sums” to the University of Pittsburgh, Carnegie Mellon and other higher education institutions in the area, and other projects such as hospitals and medical schools in Western Pennsylvania, social services and cultural activities. 

 Related stories will be right here … 

Richard and Constance Prosser Mellon raised four children together, including Constance “Connie” Barber Mellon.

According to Sotheby’s, Connie is remembered as an active patron of the arts. Like her mother, she took an interest in horseback riding. 

As an adult, she lived in Washington, D.C., and New York, and supported organizations including the National Gallery of Art and the Whitney Museum of American Art.

From her collection, eight pieces of jewelry will be offered at auction, including a David Webb ruby necklace she was photographed in.


Though her style is described as being more fashion-forward than her mother’s, one piece from Connie’s collection is a classic attributed to Cartier—a sapphire brooch with a paisley design featuring an antique pear-shaped diamond accented with round and oval sapphires, and old European- and old mine-cut diamonds.

It’s estimated to sell for $15,000 to $20,000.

Constance “Connie” Barber Mellon’s Cartier sapphire brooch
Sapphire and diamond clip brooch attributed to Cartier (Photo courtesy of Sotheby’s)


The other pieces in her collection are bold as well, featuring vivid rubies and sapphires.


“In contrast to the stately, royal-like Cartier jewels of her mother, Connie was drawn to more fashion-oriented and whimsical design-led jewels of David Webb, the quintessential American jeweler of the 1960s and 1970s, which she treasured and wore on numerous occasions,” Sotheby’s said. 


David Webb was inspired by his weekly visits to the Metropolitan Museum of Art to incorporate motifs from around the world, including India.

Webb’s global inspiration is reflected throughout Connie’s collection, with many of her pieces featuring carved rubies, emeralds and sapphires in a Mughal style.

Constance “Connie” Barber Mellon’s David Webb gold and ruby monkey timepiece
This David Webb gold, diamond and ruby monkey desk clock is estimated to sell for $30,000 to $50,000. (Photo courtesy of Sotheby’s)


Also set to appear in Sotheby’s June Magnificent Jewels auction is the headlining 10.57-carat internally flawless, fancy vivid purplish pink diamond known as “The Eternal Pink,” expected to sell for at least $35 million, and the 55.22-carat ruby “Estrela de Fura” expected to garner more than $30 million. 


The Latest

Audemars Piguet x Swatch white Royal Pop watch
WatchesMay 19, 2026
Here’s the AP x Swatch Pocket Watch That Caused Pandemonium

The $400 pocket watch is a blend of Audemars Piguet’s iconic eight-sided Royal Oak and Swatch’s unserious Pop watches from the ‘80s.

Chris Ploof Modern Electrum Collection Milgrain Rows and Diamonds Ring
CollectionsMay 19, 2026
Chris Ploof’s New Collection Makes an Ancient Medal Modern

With gold prices on the rise, the “Modern Electrum” collection uses an alternative, non-tarnishing metal alloy composed of gold and silver.

Ellen and Michael Fruchtman
IndependentsMay 19, 2026
Ellen and Michael Fruchtman Retire, Sell Marketing Agency

Fruchtman Marketing has new owners, Erin Moyer-Carballea and Manuel Carballea, and will relocate to Miami.

1872x1052-NextGem-2026-National-Jeweler-Advertorial.jpg
Brought to you by
How Modern Training Is Becoming a Competitive Advantage for Jewelry Retailers

With the trade and customer trust in mind, GIA® developed NextGem™ – on-demand training designed specifically for retail.

Peter Smith and National Jeweler contributor
ColumnistsMay 19, 2026
Peter Smith: The (Mostly) Immutable Sales Truths

In a column for the 2026 State of the Majors issue, Smith lists 10 time-tested principles about sales that still ring true.

Weekly QuizMay 14, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Edahn Golan, Tenoris co-founder and National Jeweler contributor
ColumnistsMay 18, 2026
Edahn Golan: What a K-Shaped Economy Means for Fine Jewelry

In a column for the 2026 State of the Majors issue, Golan spells out how the growing economic divide in the U.S. is reshaping the market.

Foundrae Limitless Expansion of Joy and Hope Collection Campaign Imagery
CollectionsMay 18, 2026
Foundrae’s New Collection Taps Into Joy

The “Limitless Expansion of Joy and Hope” collection evokes summer through colored gemstones and motifs of butterflies and florals.

Antique Jewelry & Watch Show
Brought to you by
Discover Timeless Treasures: A Showcase of Antique Jewelry & Timepieces in Las Vegas

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

Inchiquin emerald
CollectionsMay 18, 2026
Hancocks London Acquires Historic ‘Inchiquin’ Emerald

The jewel, circa 1890, is from the late Victorian era and was owned by descendants of the last high king of Ireland.

JCK Industry Fund Logo
Events & AwardsMay 18, 2026
Here Are the 2026 JCK Industry Fund Grant Recipients

This is what the nine recipients plan to do with the funds.

MJSA Education Foundation and Jewelers of America
Events & AwardsMay 15, 2026
JA, MJSA To Sponsor Roundtable at TJS

The discussion, "Rebuilding the Jewelry Workforce," will take place on Saturday, May 16, in Troy, Michigan.

Three gold rings set with yellow- and brown-hued diamonds
SourcingMay 15, 2026
State of Diamonds: The Way Forward for Natural Diamonds

The jewelry industry is reassessing its positioning as Gen Z reshapes the retail landscape and lab grown continues to gain market share.

DeBeeers_Bridal_Display_Dune_1872x1052.jpg
Supplier BulletinMay 14, 2026
A Diamond Is Forever Continues Desert Diamonds – Bridal Reinvigorated

Sponsored by A Diamond Is Forever

Faceting Apprentice gem cutting school
SourcingMay 14, 2026
State of Colored Stones: The Spirit of Young American Gemstone Cutters

The next generation of lapidarists are entrepreneurial, engaged online, and see the craft as a means for artistic expression.

Ocean Dream diamond
AuctionsMay 14, 2026
‘Ocean Dream’ Makes Waves at Christie’s, Fetching $17M

It was the second auction appearance for the fancy vivid blue-green diamond, which sold for $7.8 million at Christie’s Geneva 12 years ago.

Stock image of police cars with their lights on
CrimeMay 14, 2026
Second Man Arrested in Florida Pawn Shop Shooting

Members of the U.S. Marshals Task Force took a 22-year-old man into custody. He was charged with tampering with evidence.

Stock image of crime scene with police cars and crime scene tape
CrimeMay 13, 2026
JSA’s 2025 Crime Report Shows ‘Concerning’ Rise in Violence

While the overall number of crimes was down, there were more incidences in which robbers pulled out guns, mace, or rammed cars into stores.

Jack Sutton Jewelers
IndependentsMay 13, 2026
New Orleans Jeweler Closing Canal Place Store

Jack Sutton Fine Jewelry is closing its store inside the downtown shopping center after 40 years in business.

Winston Red Diamond painting by Reena Ahluwalia
SourcingMay 13, 2026
Smithsonian Acquires ‘Winston Red’ Diamond Painting

Reena Ahluwalia’s painting of the rare red diamond is the first contemporary painting to join the National Gem Collection.

Anna Maccieri Rossi Ora Wood Sunrise Cuff, Marie Lichtenberg High Jewelry Bandana, Anna Maccieri Rossi Carpe Diem Pendant
TrendsMay 13, 2026
State of Design: Only the Innovative Will Survive

The price of gold has risen, affecting the number of pieces designers make, the materials they use, and how they position themselves.

The Retail Smiths founder and National Jeweler columnist Peter Smith
ColumnistsMay 12, 2026
It’s Official: We’re Getting ‘Brain Rot’ From Watching Short-Form Videos

Peter Smith gives tips on leading meetings, developing marketing, and making trade show appointments in the age of short attention spans.

Jessica McCormack Medallion Capsule Collection Campaign
CollectionsMay 12, 2026
Jessica McCormack Debuts Antique Coin-Inspired Medallions for Summer

The 11-piece “Medallions” capsule collection features five motifs: a crying eye, a heart on fire, a spiral, a flower, and a swallow.

People shopping in a jewelry store
IndependentsMay 12, 2026
State of Retail: 6 Things Retailers Should Know About Consumers Today

From Gen Z’s view of luxury to “doom spending,” these are the six consumer trends to note this year.

Tiffany & Co. x CFDA Jewelry Designer Award
Events & AwardsMay 12, 2026
The Tiffany & Co. x CFDA Jewelry Designer Award Is Back

The partners have announced the second cycle of the program, which has expanded to include a $25,000 student scholarship.

Merle, Juanita, and Brent Staats of Staats Jewelers
IndependentsMay 11, 2026
Kansas Jeweler Closing After 70 Years

The owners of Staats Jewelers are heading into retirement.

Former Macy’s CEO Jeffrey Gennette
TrendsMay 11, 2026
Former Macy’s CEO Joins Signet Jewelers Board

Jeffrey Gennette, who retired in 2024 after 41 years with Macy’s, is the newest member of the jewelry retailer’s board of directors.

Buddha Mama gold earrings hexagon emerald
TrendsMay 11, 2026
Amanda’s Style File: Lucky May

May babies are lucky to have emeralds, a gemstone admired for centuries, as their birthstone, writes Amanda Gizzi.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy