The new facility, its first outside of Thailand, will boost its manufacturing capacity by 50 percent.
LA Museum Going Green with Diamonds This Winter
The Natural History Museum of Los Angeles County will open an exhibition featuring more than 60 rare green diamonds on Saturday.

Los Angeles--The Natural History Museum of Los Angeles County is going green in a big way.
On Saturday, the museum will open a new exhibition called “Green Diamonds: Natural Radiance,” adding eight cases of the green gems to its Gem and Mineral Hall.
The loose and set diamonds come as part of the Gamma Collection, which is on loan from Optimum Diamonds LLC and was assembled over a period of about 15 years. Gamma is comprised of more than 60 of the rarest and most prestigious natural colored diamonds in the world, according to the museum.
The collection showcases a variety of shapes, cuts and shades of the color spectrum.
The highlight of the exhibition is “The Mantis,” the largest vivid yellowish-green diamond ever graded by the Gemological Institute of America at 4.17 carats, as well as “The Shangri-La,” a large vivid green diamond weighing 3.88 carats. Both are mounted in rings.
There also is “The Light of Erasmus,” an extremely rare 1.63-carat vivid greenish-blue diamond.
In addition to seeing the diamonds, the exhibition also will give museum visitors the opportunity to learn about the formation of diamonds and scientific origins of the green color, including the gamma radiation that inspired the name of the collection.
The exhibition also will explore the unsolved mysteries behind “Chameleon” diamonds, which temporarily change color when exposed to light or heat. “Natural Radiance” will feature three of these stones, including a 3.08-carat dark gray greenish-yellow diamond.
The company will also exhibit two very rare diamonds Optimum Diamonds won at the 2017 Argyle Pink Diamonds Tender: the Argyle Everglow and the Argyle Liberté.
The collection will be on view at the museum from Dec. 9 through April 1, 2018.
Coinciding with the launch of the exhibition, the Los Angeles GIA Alumni Association and WJA Los Angelses are hosting the second annual “Night Among Gems” event at the museum on Wednesday, Dec. 13 from 6 to 9 p.m.
Attendees will get to see the stones as well as mingle with Associate Curator of Mineral Sciences Aaron Celestian.
Tickets can be purchased online.
The Latest

The special-edition “Dream” pendant, our Piece of the Week, was created to mark Hearts On Fire’s 30-year milestone with 30 diamonds.

Dubai Jewelers in Springfield, Virginia, was once again the target of an armed robbery.

Experience gemstones with greater precision and comfort than ever before.

YouGov’s 2026 U.S. Most Recommended Brands report’s out, and a fast-fashion giant is sitting at No. 1 while Rolex is just shy of the top 5.


The rings, crafted by Jason of Beverly Hills, celebrate the hockey team’s Stanley Cup win with design elements that honor its traditions.

This roundup of birthstone jewelry for October features vibrant tourmalines and opals with personality.

Submit your pieces for a chance to win in this year's competition.

President Duma Boko spoke at back-to-back events in the city last week, touting Botswana’s stability and the diamond “bounceback.”

The catalog showcases 112 new, one-of-a-kind pieces amid highlights from the jeweler’s historic archive.

Its Montepuez Ruby Mining operation in Mozambique, which is not yielding enough high-quality rubies, has taken a $125 million hit.

Those surveyed were worried about the present and the future, with write-in responses mentioning high oil and gas prices.

The event will take place on the evening of Oct. 26 in New York City.

She is remembered for her joie de vivre, upbeat personality, genuine interest in other people, and love of the Alabama Crimson Tide.

Online bidding is open now for Julien’s sale of items owned by the “Walk On By” singer, whose final album comes out this fall.

The founder and executive chairman of Stuller Inc. is being honored for his impact on the jewelry industry at the 25th annual Gem Awards.

December is the most popular month to propose, and jewelers need to keep that in mind when planning their holiday marketing.

Cat ladies of the jewelry world, unite. Sandy Lerner’s collection of cat jewelry and other objects is going up for auction Wednesday.

“Vibrations” features several firsts for De Beers’ high jewelry, including the use of chalcedony and diamonds sourced from artisanal miners.

The “Bows” collection features three interpretations of the bow motif designed with Georgian and Victorian influences.

The American Gem Society recognized industry members, one Guild, and a law enforcement official for their contributions to jewelry.

Through a new system integration, customers can now receive instant personal jewelry insurance quotes at the time of appraisal.

Five of the 10 fastest-appreciating Rolex models on Bob’s Watches were Datejust 31 or Lady Datejust watches.

The Sherwood family and AJS Creations CEO Tejas Shah purchased the jewelry chain back from Palladium Equity Partners.

“The Elizabeth Taylor Collection” uses lab-grown diamonds and gemstones in contemporary designs inspired by the icon.

The artist wore Dana Rebecca Designs’ marquise diamond-set gold hoops at the Chiefs game last Sunday. Now they’re our Piece of the Week.

JSA and Jewelers Mutual shared advice on spotting suspicious behavior, combatting cell phone jammers, and staying safe at home.

























