‘100 Carats’ Exhibition Opens at LA Museum
A new display at the Natural History Museum of Los Angeles County features dozens of gemstones each weighing 100 carats or more.

The exhibition, “100 Carats: Icons of the Gem World,” showcases more than 30 gemstones.
Of those, 20 stones weigh more than 100 carats each. This grouping includes the centerpiece of the collection and one of the largest cut diamonds in the world, the Jonker I Diamond, pictured at the top of the story.
The 125-carat diamond is the largest stone cut from the Jonker Diamond—the fourth-largest diamond in the world when it was discovered in 1934. The public has not seen this diamond since it was bought by a private buyer in 1977, the museum said.
Though it has been showcased by royalty and Hollywood stars over the years, this is the Jonker I’s first time on display in a museum in more than eight decades, thanks to current owner Ibrahim Al-Rashid, who lent the stone to the museum for the exhibition.
“The Jonker is one of the largest and most famous diamonds ever unearthed,” said Al-Rashid, who is also chairman of Miami-based Limestone Asset Management.
“Its beauty and history are compelling. I'm grateful to have [The Jonker I] on display for viewers to enjoy for the first time in many decades.”
Also on display, for the first time ever, is the 100.06-carat sapphire, “The Miracle,” which was discovered last year, as mentioned in the promotional video linked below.
A variety of other colored gemstones are on view as well, including the “Crown of Colombia,” a 241.04-carat Colombian emerald, and “The Scarlet Red,” a 112.68-carat rubellite.
See The Gemstones
“The collection presented within ‘100 Carats’ is unrivaled in both importance and rarity within the gem world,” said Dr. Lori Bettison-Varga, president and director of NHMLAC.
“Gems of such magnificent size and quality have never been displayed before in this quantity in one exhibition. This unique exhibition captures the brilliance of our mineral sciences collection and offers a breathtaking experience for our visitors this winter and beyond.”
This exhibition was organized by NHMLAC in collaboration with Robert Procop Exceptional Jewels, the collection from which comes, among others, “The Blue Star,” a 108-carat aquamarine, and “The Imperial,” a 111-carat green tourmaline.
The 100-carat loose stones are displayed inside the museum’s Hixon Gem Vault, and outside the vault, mounted jewelry is on view, featuring pieces with gems weighing 50 to 100 carats.
While these gems are beautiful and brilliant, the museum said, each gem is also a “minor geologic miracle,” their existence evidence of mountain-building events, volcanic eruptions, and the unforgiving pressures and temperatures of the Earth’s interior.
This exhibit allows guests and scientists a glimpse into Earth's geological processes and circumstances that happened millions of years ago to form them in the first place, while also illuminating the long and rich history of art and culture through the ages.
“The show is a once-in-a-lifetime event,” said NHMLAC’s Curator of Mineral Sciences Dr. Aaron Celestian.
“The rarity of these gems cannot be overstated. Visitors will be able to see tremendous examples of gemstones in a rainbow of vivid colors that have been expertly cut to display their remarkable brilliance. I am thrilled that we’ve been able to bring these giant gems together for the first time.”
NHM’s 6,000-square-foot Gem and Mineral Hall opened in 1978 and features exhibition halls of minerals, rocks, gems, ores, and meteorites.
The permanent collection features roughly 175,000 specimens, including fine gem collections from Myanmar (formerly Burma), South Africa, Colombia, Sri Lanka, and other destinations.
The “100 Carats: Icons of the Gem World” exhibit opened Dec. 8, 2023, and will close April 21. Exhibition programming and hours may vary.
Entrance is included in the price of admission to NHMLAC or free for members.
More information is available on the museum’s website.
The Latest

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

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

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

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

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


The owners of Staats Jewelers are heading into retirement.

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

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

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

The new module allows retailers to plan, promote, and measure the success of events from a single dashboard.

NDC said in an open letter that Pandora’s statements about the carbon footprint of lab grown versus natural diamonds are inaccurate.

She wore our Piece of the Week, Glenn Spiro’s “Old Moghul Golconda” earrings, featuring fancy brown-yellow diamonds totaling 51.90 carats.

Two pieces were named “Best in Show,” one from the retail category and one from the supplier category.

The jewelry retailer noted resilience among its higher-end customers while demand softened for its lower-priced offerings.

Led by the 6.59-carat sapphire, the sale garnered $9.7 million, a record total for a Heritage jewelry auction.

In his new role, sales specialist Billy Welshoff will focus on the eastern United States.

José Gaztelu has been promoted to the role, which has been vacant since last year.

It has also opened the application period for the Seymour & Evelyn Holtzman Bench Scholarship through June 30.

The company announced the change alongside its Q1 results, which showed that the jewelry brand’s year is off to a shaky start.

The retailer will cut 16 percent of its corporate workforce as part of its plan to exit bankruptcy.

Of the many examples used in the filming of “Le Mans,” this one is believed to have spent the most time on Steve McQueen’s wrist.

Megan Piccione dressed Lauren Wasser in layers of diamond jewelry, making her stand out in a crowd that included celebrities like Beyoncé.

Following decades of association leadership, the “semi-retired” colored gemstone expert is turning his focus to gemstone education.

The museum’s new exhibition will feature one of Jesse Owen’s Olympic medals, Yogi Berra’s crown, Super Bowl rings, and more.

The new program provides access to media exposure and editorial opportunities for exhibitors and retailers.

The “Eclipse” jewelry collection captures the fleeting moment where light and shadow align though onyx, diamonds, and freshwater pearls.

Buying discipline at trade shows starts with clarity about your inventory levels, Smith writes.
























