AuctionsOct 24, 2025
Bonhams Under New Ownership, Top Executives ReplacedLondon-based investment firm Pemberton Asset Management acquired the auction house for an undisclosed amount.
SourcingFeb 05, 2019
Potentate Mining Unveils 64-Carat Montana Sapphire
The “Ponderosa Sapphire,” recovered from Rock Creek last summer, will be on display in Tucson.
The 64.14-carat “Ponderosa Sapphire,” uncovered at Potentate Mining’s Rock Creek mine, before heating (Photo credit: Jeffrey R. Hapeman, Earth’s Treasury)
Rock Creek, Montana—Potentate Mining has unveiled a 64.14-carat sapphire recovered at its Rock Creek mine in Montana.
The mining company believes it to be the largest gem-quality sapphire to be unearthed in the U.S.
Dubbed the “Ponderosa Sapphire” to evoke images of the West and as an ode to the ponderosa pines on the mine’s property, the gem was uncovered in August 2018 as Potentate was moving gravel to create new settling ponds for a processing plant that is in the works, the company’s marketing director Warren Boyd told National Jeweler.
The company said the rare crystal is perfectly formed and without damage because of the millions of years spent in the weathered gravels at the mine.
RELATED CONTENT: Postcard Montana: Heading West to See a Sapphire MineBoyd said it shows a yellow core common to Rock Creek sapphires.
If cut, the crystal would result in several large polished sapphires—due to a crack inclusion preventing one large faceted stone—but Boyd said the company isn’t in a rush to get rid of it and is likely to maintain ownership for the time being.
In fact, it wants to celebrate and share the sizeable rough.
It will do that by sending the sapphire to Tucson, where the stone will be exhibited at The Collector’s Edge Minerals booth at the upcoming Tucson Gem & Mineral Show, running from Feb. 14 to 17 at the Convention Center.
More on Sourcing
The Latest
GradingOct 24, 2025
DMIA to Hold Diamond Testing Instrument DemoThe workshop will give attendees the chance to try out and ask questions about three different diamond verification instruments.
CrimeOct 24, 2025
Video Emerges of Louvre Jewelry Robbers Fleeing the Scene The footage shows two of the jewelry heist suspects descending from the second floor of the museum and then escaping via scooter.
Brought to you by
Are Earrings an Overlooked Category? What Retailers Need to Know NowAs the holiday season quickly approaches, consider stocking one category that sometimes gets overlooked: earrings.
CollectionsOct 24, 2025
Piece of the Week: Wyld Box Jewelry’s ‘Ray of Light’ EarringsFounder and designer Rosanna Fiedler looked to a vintage Cartier clutch when designing the sunlight-inspired drop earrings.
Weekly QuizOct 16, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
FinancialsOct 23, 2025
Jewelry Sales Resilient Despite Struggles at LVMH, KeringThe luxury conglomerates faced a challenging Q3 amid geopolitical and economic tensions.
WatchesOct 23, 2025
‘Million Dollar Hip Hop Watches’ Recounts Watch HistoryThe book details the journey of watches as symbols of hard-earned success in hip-hop for artists like 2Pac, Jay-Z, and more.
Brought to you by
Protect Your Customers and Your BusinessYou deserve to know what you are selling–to protect your customers as well as your business and your reputation.
AuctionsOct 23, 2025
Freeman’s | Hindman Names New VP, Senior Specialist for Jewelry & WatchesAlexis Vourvoulis, who most recently worked at Tiffany & Co., brings more than two decades of jewelry experience to her new role.
TrendsOct 22, 2025
The Taylor Swift Effect: Antique Diamonds EditionThe superstar’s August engagement put the stamp of approval on an already hot engagement ring trend.
TrendsOct 22, 2025
Don’t Forget These Diamond Jewelry Trends When Stocking for the HolidaysRetailers should offer classic styles with a twist that are a perfect fit for layered looks, experts say.
AuctionsOct 22, 2025
Pink Diamond, Vanderbilt Jewels to Headline Phillips’ Geneva AuctionThe nearly 7-carat fancy vivid purplish pink diamond could sell for around $9 million.
CollectionsOct 22, 2025
Tiffany & Co.’s ‘Bird on a Rock’ Finds New PerchChief Artistic Officer Nathalie Verdeille has reimagined the iconic design in both figurative and abstract creations.
Events & AwardsOct 22, 2025
JFC Kicks Off Halloween Costume ChallengeFive dollars buys one vote toward an industry professional you want to see dressed up as a hero, or a villain, this Halloween.
Events & AwardsOct 22, 2025
Hillsborough Antique Show Gets New OwnerRecently acquired by KIL Promotions, the November edition of the public show in San Mateo, California, will be held Nov. 7-9.
GradingOct 21, 2025
GIA Examines Rare Bicolor Pink DiamondThe stone’s two zones, one pink and one colorless, may have formed at two different times, the lab said.
MajorsOct 21, 2025
Pomellato Brings ‘Global Attitude’ to Rodeo Drive FlagshipHollywood glamour meets Milanese sophistication in the design of Pomellato’s new store in Beverly Hills, California.
Lab-GrownOct 21, 2025
Grown Brilliance Opens First FlagshipThe New York City store showcases a chandelier with 1,500 carats of lab-grown diamonds designed by an FIT student.
Events & AwardsOct 21, 2025
‘Douriean Fletcher: Jewelry of the Afrofuture’ Opens at MADThe Museum of Arts and Design's new exhibition features 75 pieces by the designer, best known for her work in the “Black Panther” films.
AuctionsOct 20, 2025
Sotheby's To Auction 10-Carat Vivid Pink DiamondMaking its auction debut, "The Glowing Rose" is expected to fetch $20 million at the November jewelry sale in Geneva.
SourcingOct 20, 2025
2 Mozambique Police Officers Killed at Gemfields’ Ruby MineThey were attacked on Oct. 15, as approximately 40 miners without licenses marched on the mine’s gate.
CrimeOct 20, 2025
See the ‘Priceless’ Jewels Stolen During Daytime Heist at the Louvre It took the masked thieves less than 10 minutes to steal eight irreplaceable jewels from two display cases in the museum’s Apollo Gallery.
SourcingOct 20, 2025
Pristine Gems Names New Director of European SalesGemologist Lauren Gayda has previously worked at The Clear Cut, Taylor & Hart, and Effy Jewelry.
IndependentsOct 17, 2025
From the Jazz Age to the Information Age: London Jewelers Turns 100In 2026, the jewelry retailer will celebrate a milestone only a small percentage of family-owned businesses survive to see.
Events & AwardsOct 17, 2025
An Edit of Italian Jewels Is Coming to NYCThe new showcase dedicated to Italian jewelry design is set for Oct. 29-30.
TrendsOct 17, 2025
Piece of the Week: Judi Powers Jewelry’s ‘Stella’ EarringsTake a gaze at the sky with this pair of platinum diamond-set star earrings with blue lace agate drops.
IndependentsOct 16, 2025
Retailer Hall of Fame 2025: Jeffrey Zimmer Jeffrey Zimmer's decades of leadership at Reeds Jewelers are defined by integrity, a love of sourcing gemstones, and a heart for community.
