Peter Damian Arguello, a jeweler in the Denver suburb of Wheat Ridge, was found dead inside his store in November 2023.
A 187-Carat Canadian Diamond Goes to Washington
The Diavik Foxfire was mined in Canada and will be on display at the Smithsonian through February.

Washington, D.C.--The largest diamond ever found in North America is making its way to Washington, D.C.
The 187.7-carat Foxfire diamond, mined in Canada, will be on display at the Smithsonian’s National Museum of Natural History beginning Nov. 17 through Feb. 16, 2017.
The museum said it will put the rough stone on display in the Harry Winston Gallery alongside another well-known gemstone, the 45.52-carat deep blue Hope Diamond.
In a news release, Jeffrey Post, curator of the museum’s National Gem and Mineral Collection, called the Foxfire “one of the great treasures of the Earth,” and noted that its display will give visitors the chance to see the big diamond in its rough state.
Rio Tinto unearthed the Foxfire in August 2015 at its Diavik Diamond Mine, which is located about 130 miles from the Arctic Circle in Canada’s Northwest Territories. The stone took its name from the aboriginal description of the Northern Lights as resembling a “brush of undulating fox tails.”
This is not the diamond’s first trip into the United States. Back in May, Rio Tinto brought it across the border, holding a private viewing of the stone in New York City.
In June, Deepak Sheth of Amadena Investments/Excellent Facets Inc. placed the winning bid in an international auction for the stone. The purchase price for the Foxfire was not disclosed.
Amadena is a diamond trading, cutting and polishing firm based in New York that is also a Rio Tinto Select Diamantaire.
Sheth has opted to keep it in its rough state thus far.
He said, “Having North America’s largest known uncut, gem-quality diamond on display at the Smithsonian is a testament to the rarity of the Foxfire diamond.
It also represents another significant chapter in the diamond’s remarkable story.”
The Smithsonian’s National Museum of Natural History is open daily from 10 a.m. to 5:30 p.m., closing only on Dec. 25. Admission is free.
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.