Peter Damian Arguello, a jeweler in the Denver suburb of Wheat Ridge, was found dead inside his store in November 2023.
Barbara Sinatra’s Diamond Ring Sells for $1.7M at Auction
Ol’ Blue Eyes proposed to her with the 20.60-carat carat emerald-cut stone in a glass of champagne.

New York—The 20-carat diamond ring with which Ol’ Blue Eyes, Frank Sinatra, proposed to his wife by presenting it in a glass of champagne went for $1.7 million at a jewelry auction Tuesday.
The 20.60-carat emerald-cut stone, flanked by two triangular-shaped diamonds, was part of a collection of Barbara Sinatra’s jewelry headlining Sotheby’s Magnificent Jewels sale in New York.
The auction house said the ring sold after an “intense competition” between two telephone bidders.
Her jewelry collection was 100 percent sold Tuesday, garnering a total of $4.7 million.
Other notable jewels included a mystery-set ruby and diamond butterfly brooch from Van Cleef & Arpels that realized $567,000, going for well above its high estimate of $175,000.
Additional items from her collection will be offered in two more dedicated auctions: “Lady Blue Eyes: Property of Barbara and Frank Sinatra” today (Dec. 6) in New York and an online-only sale, open for bidding through tomorrow (Dec. 7).
Meanwhile, Tuesday’s Magnificent Jewels auction totaled $46.4 million, pushing Sotheby’s jewelry sales for 2018 past the $400-million mark.
It featured a number of other important pieces, including an F color, internally flawless 51.52-carat cushion-cut diamond set in a Harry Winston ring, the auction’s top lot at $4 million.
At No. 2 was a 25.03-carat D color, flawless emerald-cut diamond that sold for $3.5 million.
A number of colored gemstones appeared in the top 10 lots sold by value, including a gold ring centered on an 8.11-carat oval-shaped Burmese ruby that went for $2.8 million, a 16.46-carat Kashmir sapphire and diamond ring that garnered $1.8 million, and a 12.03-carat Colombian emerald and diamond ring that sold for $1.5 million, all three of which are seen below.
Interestingly, what didn’t sell Tuesday was a ring set with a 10.62-carat pear-shaped fancy vivid blue diamond accented by round diamonds. The second-largest vivid blue diamond to go up on the block in New York, according to Sotheby’s, was called “highly important” by the auction house and estimated to sell for between $20 million and $30 million but failed to find a buyer.
To see the full list results of Tuesday’s jewelry auction, visit Sothebys.com.
The Latest

The retailer, owned by Berkshire Hathaway, is becoming part of the Berkshire Hathaway Jewelry Group with Helzberg.

The Continental Buying Group’s 2025 Tampa Experience Show is slated for Sept. 8-10.

As a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.

Associate Editor Lauren McLemore recently attended a fabrics trade show where a trend forecaster shared her predictions for summer 2027.


The company raised its full-year sales guidance while noting it has not yet assessed the potential impact of the latest tariff news.

The organization has raised more than $1.3 million for charity since its inception.

The Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.

The brand’s latest iteration of a bezel-set diamond bangle features clean lines and a timeless design for a new modern silhouette.

The first watch in the series commemorates his participation in the Civil Rights movement, marching from Selma to Montgomery in 1965.

The catalog contains a complete listing of all the loose gemstones in stock, as well as information about the properties of each stone.

The company added a retailer dashboard to its site and three new birds to its charm collection, the cardinal, blue jay, and hummingbird.

An additional 25 percent tariff has been added to the previously announced 25 percent.

The jewelry and accessories retailer plans to close 18 stores as part of the proceedings.

Its Springfield, Massachusetts, store is set to close as owner Andrew Smith heads into retirement.

Designer Hiba Husayni looked to the whale’s melon shaped-head, blowhole, and fluke for her new chunky gold offerings.

She will present the 23rd edition of the trend forecasting book at Vicenzaoro on Sept. 7.

Omar Roy, 72, was arrested in connection with the murder of jeweler Dionisio Carlos Valladares.

The New Orleans-based brand’s “Beyond Katrina” jewels honor the communities affected by the storm.

Lilian Raji explains why joining an affiliate network is essential for brands seeking placements in U.S. consumer publications.

The organization has awarded a total of $42,000 through its scholarship programs this year.

The winner of the inaugural David Yurman Gem Awards Grant will be announced live at the 2026 Gem Awards gala.

As summer winds down, celebrate the sunny disposition of the month’s birthstones: peridot and spinel.

Moshe Haimoff, a social media personality and 47th Street retailer, was robbed of $559,000 worth of jewelry by men in construction outfits.

Xavier Dibbrell brings more than a decade of experience to the role.

The addition of Yoakum, who will lead Kay and Peoples, was one of three executive appointments Signet announced Thursday.

The insurance company’s previous president and CEO, Scott Murphy, has split his role and will continue as CEO.