Rough diamond crystal. Transmitted and reflected light. Image by Gary Roskin. Diamond provided by AMGAD. | | | | |
Issue 25, December 12, 2025
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With thanks to our advertisers — their support helps make this coverage possible!
This Week in the Roskin Gem News Report!
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The Return of Jonker VI!
Sotheby’s New York Presents a Year-end Auction Led by the Rediscovered Jonker VI, and an Exceptional Lineup of Fancy Colored Diamonds
Colored Gems-set Jewels were impressive as well!
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On December 9, at Sotheby’s new New York home in the Breuer Building, an impressive lineup of diamonds, important colored stones, and signature house creations took the stage — led by the reappearance of a long-missing piece of diamond history, the Jonker VI.
The Return of the Jonker VI
The star of the sale (in our humble opinion) was the Jonker VI, a 22.85-carat D-color, VVS1, Type IIa emerald-cut diamond whose whereabouts had been unknown for nearly ninety years.
The Jonker History Initially fashioned by Lazare Kaplan (the man, not the company) in 1936 from a 53.95-carat section of the 726-carat Jonker rough, Jonker VI emerged as a 24.91-carat emerald cut. (That is number VI out of XII, one marquise and eleven emerald cuts from the 726-carat rough).
Now recut to 22.85 carats, Jonker VI re-enters the public sphere for the first time since its creation. The Jonker VI was estimated to sell between $1 & $1.5 million, and did, plus the buyers premium, totaling just over $2 million.
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A Serious Showing of Color
Alongside the Jonker, the sale included a curated group of fancy colored diamonds — not just one standout example, but several stones that could have headline their own auctions.
First up, a 3.48-carat Fancy Intense Blue (Internally Flawless, modified pear shape), estimated to sell for between $2 and $3 million, sold for $2.55 million.
There’s a very interesting natural pearl necklace, that hosts 59 graduated round to near-round pearls measuring approximately 10.55 to 5.16 mm. But it’s the clasp that grabbed our attention – set with a 3.78-carat Fancy Blue marquise-cut diamond, estimated to sell for around $1 million, sold for $1.27 million.
Sotheby's also had a 3.27-carat Fancy Vivid Orangy Pink diamond ring, also estimated to sell for around $1 million. (This stone has the same color grade as the Desert Rose, the 31.68 carat pear-shape that Sotheby's just sold in Abu Dhabi for $8.8 million.) It sold for $920,750.
Then there was a 5.23-carat Natural Fancy Intense Green diamond. Natural green diamonds are extremely rare, and often are extremely difficult to identify as natural. This particular diamond is even more interesting in that the clarity grade is based on "patches of color." (Curious about that clarity call? We were too! Tap through to the full feature.)
Rounding out our list (but not the complete auction list) is a 12.51-carat Bulgari ring set with a Fancy Vivid Yellow cushion cut diamond. Fantastic saturation of color, it was estimated to sell for between $450,000 and $650,000, but did not sell.
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Signed Jewels — A Strong Supporting Cast
Beyond the headline diamonds, the sale features important pieces by JAR, Van Cleef & Arpels, Oscar Heyman, Hemmerle, Bulgari, Paul Flato and others, including the jewelry designer who created Taylor Swift's engagement ring - Kindred Lubeck.
Seen here: Cartier necklace set with 25 oval brilliant cut diamonds, all Fancy Vivid Yellow or Fancy Vivid Orangy Yellow, all with GIA reports! WOW!
Tap here for our review of this week's auction!
| | National Association of Jewelry Appraisers | | Accredited Gemologists Association | | Gemological Institute of America | | American Gem Trade Association | | Gemological Institute of America | | Susan Jacques Awarded GIA's Richard T. Liddicoat Award for Distinguished Achievements | | |
During the GIA Board of Governors meeting in early November at the Institute’s headquarters in Carlsbad, California, the Institute honored Susan M. Jacques with its highest honor, the Richard T. Liddicoat Award for Distinguished Achievement.
Chair of the GIA Board of Governors Lisa Locklear, and GIA President and CEO Pritesh Patel presented the Richard T. Liddicoat Award to Jacques, who stepped down as GIA’s sixth president and CEO in August and will retire at the end of the year.
As reported in January of this year, Susan Jacques became GIA’s president and CEO on January 1, 2014, after serving as interim CEO for six months. Before that, she was a member of the GIA Board of Governors since 1996; she was Chair of the Board from 2008 to 2014. As CEO, she continued as a member of the Board.
“At GIA, I have been fortunate to lead one of the industry’s most trusted organizations and our passionate teams around the world as we ensured the truth about gems through innovation, service and knowledge,” said Jacques.
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Seen above: Recipients of the Richard T. Liddicoat Award for Distinguished Achievement... (left-to-right) GIA Analytical Microscopist John Koivula, Kathryn Kimmel, GIA’s first chief marketing officer (retired), GIA’s sixth president and CEO Susan Jacques, GIA Executive Vice President and Chief Laboratory and Research Officer Tom Moses, Alice Keller, long-time editor of Gems & Gemology (retired), and GIA Distinguished Research Fellow Dr. James E. Shigley.
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“It is with great pride and admiration that we present the Richard T. Liddicoat Award for Distinguished Achievement to Susan Jacques,” said Lisa Locklear. She continued, “A leader throughout her remarkable career, Susan has been the heart and soul of GIA.”
GIA President and CEO Pritesh Patel added, “Susan’s vision, integrity, compassion, and unwavering dedication influenced GIA, the gem and jewelry industry, and everyone she has shared her time with. That positivity will resonate for years to come.”
Since its establishment in 1994, the Richard T. Liddicoat Award for Distinguished Achievement has been awarded to just 14 individuals. Three of those continue to contribute their expertise to GIA – analytical microscopist John Koivula; Tom Moses, the executive vice president and chief laboratory and research officer; and Dr. James E. Shigley, GIA’s only distinguished research fellow.
Congratulations Susan!
Tap here for more about the Richard T. Liddicoat Award for Distinguished Achievements
| | The Accredited Gemologists Association Bonanno Award | |
AGA Honors Brendan M. Laurs
with the 2025 Antonio C. Bonanno Award
for Excellence in Gemology
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The Accredited Gemologists Association (AGA) is proud to announce that Brendan M. Laurs, Editor-in-Chief of The Journal of Gemmology, has been selected as the 2025 recipient of the Antonio C. Bonanno Award for Excellence in Gemology.
Chosen by AGA members, this prestigious award honors Laurs’ outstanding contributions and lifelong dedication to advancing gemology.
A highly respected gemologist and geologist, Laurs (MS, FGA, GG) is based in the San Diego area and is internationally recognized for his expertise in the formation of colored gemstone deposits. His passion for geology began early, sparked by his exploration of gem-bearing pegmatites in San Diego County. He earned a B.S. in Geology from UC Santa Barbara and an M.S. in Geology from Oregon State University, where his graduate work focused on pegmatite-related gem deposits—including emeralds and tourmalines—in northern Pakistan.
Throughout his career, Laurs has conducted extensive research on colored stone deposits across the globe, including key localities in Africa, Madagascar, Brazil, Asia, and the United States. He also briefly served as an exploration geologist for Kennecott Exploration Co., working with rare gemstones such as benitoite and red beryl. From 1997 to 2012, Laurs served as Editor of Gems & Gemology at the Gemological Institute of America (GIA).
Since 2013, he has led The Journal of Gemmology as Editor-in-Chief and has played a pivotal role in organizing the annual Gem-A Conference in London. Laurs will be a featured presenter at the AGA Gemological Conference in Tucson, Arizona, on February 4, 2026. Later that evening, he will be formally honored at the AGA Gala Dinner-Dance, where he will receive a personalized award plaque and an honorarium funded by the AGA membership.
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We spoke with Brendan Laurs about his award, and he admits the reality of it is only now settling in — helped along by a wave of congratulatory calls and emails. Still humble, and clearly pleasantly surprised, he offered his first reaction: “It’s an honor to be honored!”
He first learned he’d been nominated in late October, while he was in Athens, Greece, for the International Gemmological Conference.
Laurs is the 29th recipient of the Bonanno Award. As part of the award, the recipient is invited to be a featured speaker at the AGA Tucson Gemological Conference, and Laurs has gladly accepted. This February, he’ll take attendees behind the scenes of what it really takes to publish a peer-reviewed journal — Gem-A’s Journal of Gemmology, where, as mentioned above, he serves as Editor-in-Chief.
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This recognition by the AGA membership reflects Laurs’ exceptional influence on the field of gemology and his enduring commitment to the scientific study and global understanding of gemstones.
Congratulations Brendan!
Tap here for more about the Bonanno Award
Tap here for Tickets to the 2026 AGA Tucson Conference and Gala
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GIA’s Fall 2025 Gems & Gemology Rare Color Diamond Spectra, Triangular Growth, and Some Truly Remarkable Images
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GIA’s Fall Gems & Gemology is now available for free online.
In this season’s issue, very rare and fascinating diamond properties bring out the nerd in the desk gemologist.
First up, the main feature story examines the broad 480 nm absorption band, which accounts for saturated yellow body color, pure orange body color (orange with no modifiers, such as yellowish-orange, or brownish-orange), and very rare “chameleon” diamonds, diamonds that change color when exposed to sunlight or heat. Diamonds that exhibit this 480 nm broad band are very rare diamonds which, so far, are only known to be mined in Russia and Canada.
Then there’s the feature that examines the unusual formation of diamond contact twins, otherwise known as “macles.” These thick triangular rough crystals have always fascinated gemologists for their unusual shape as well as wonderful surface markings. This feature goes even further to study not only the outer appearance, but also in how these crystals grow – examining the interior structure of macles.
G&G covers a huge variety of topics, including the three feature articles, Lab Notes, G&G Micro-World, Gem News International, and the return of the Diamond Reflections column, titled “Raw Brilliance: Nature’s Diamond Sculptures," examining some very interesting rough diamond shapes.
Tap here to see more and for the link to GIA's website where you can download your own personal copy of Fall G&G
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Unearthed: Raw Beauty
See some of the rarest and most spectacular mineral specimens ever discovered.
Los Angeles Natural History Museum December 14, 2025 through April 18, 2027
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A Not-to-Be-Missed Exhibition at the NHM
If you’re heading through Los Angeles anytime soon, put the Natural History Museum on your must-see list. Their newest exhibition, Unearthed: Raw Beauty, brings together some of the rarest and most extraordinary mineral specimens you’ll ever encounter — many of them making their public debut.
Gems, Jewelry, and Minerals
Billed as an exhibition that takes you “underground,” it offers a deeper look at how minerals and crystals form, why they behave the way they do, and where they appear in everyday life — from remote caves, to your kitchen countertop, to your jewelry.
For those of us who marvel at nature’s work, several of these beauties will have you leaning in for a better, closer, and longer look.
In short: Unearthed: Raw Beauty is that rare exhibition that’s as visually spectacular as it is scientifically engaging. If you’re anywhere near Los Angeles — downtown in the Jewelry District — near Pershing Square — or even just passing through on the 10 or the 110 — trust me: go!
| | Gemmological Association of Great Britain | | | | | Gemmological Association
of Australia | | Global Warming - Affecting Your Life | |
Recovering from Cyclone Ditwah
Quick Notes from Sri Lanka
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Concerned for our friends and colleagues across Sri Lanka’s gem industry, we reached out as the cyclone swept through the region to make sure everyone was safe. Responses began arriving quickly — reassuring, candid, and very much in the spirit of this resilient trade.
"We’re all safe, thankfully. The cyclone caused quite a bit of disruption, but things are slowly stabilizing." Even with that relief, the economic ripple was immediate. "Business has definitely been affected over the past few days."
Several colleagues noted that the storm knocked out essential infrastructure — making both mining and market activity difficult. "Transport, power, and communications were all down. But many areas are already recovering, and the show will proceed as planned." Updates from the mining regions were similarly mixed: grateful that people are safe, aware that the path back to normal operations will take time.
"The Elahera area is safe, thankfully. But it will take some time to return mining processes back to normal. On the good side, I hope some new gem clusters will be discovered with the landslides." — Sashin Madush
Others in Colombo shared that, while the city weathered the storm relatively well, the situation varies across districts. "Thank you for the your caring message. We are all fine in Colombo. No major damage or destruction."
"The water is receding in many areas & exiting from the openings near the costal areas. Mining areas are not so much affected. Mainly northeast & Kandy/Badulla."
And with tourism playing such a significant role in Sri Lanka’s economy, it was heartening to hear reports that key destinations remain intact. "Most of the coastal tourist areas have not been damage." As always, the Sri Lankan spirit comes through — faith, gratitude, and an eye toward rebuilding.
"We are small blessed country. With the help of God, I am sure we will rebound fast.🙏🏼" — Altaf Iqbal
Others, like veteran gemologist Gamini Zoysa, are already stepping into relief efforts. "We are all okay in Colombo. I am involved in giving flood relief to victims in affected areas."
We’ll continue to stay in close contact with our colleagues there, and keep you posted with any update we receive. - gr
[Tap the image above to keep up with the local news!]
| | UPDATE: Jewel Heist - the Louvre | |
AN UPDATE – The Stolen French Crown Jewels
Better Images of What Was Taken
BONUS! The Smithsonian's French Crown Jewel? (No, Not THAT One!)
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Over a Month Later…
It has now been over a month since four men, disguised as construction workers, bright orange vests and all, drove a compact ladder truck up to the Louvre, extended the lift to a third-floor balcony of the Galerie d’Apollon, cut through a window, and in under seven minutes stole eight pieces of France’s Crown Jewels.
What felt, at first, like a surreal movie plot has since hardened into a sobering reality: seven of those jewels remain missing, and the investigation has exposed significant cracks in France’s museum-security armor.
Arrests & Investigations
French authorities have now arrested nine individuals, with four formally placed under investigation for organized theft and conspiracy. Among them, reportedly, is a former Louvre security guard, a revelation that understandably raises concerns about insider knowledge. One suspect was detained early on at Charles-de-Gaulle Airport attempting to leave the country. According to the BBC, in late November, authorities announced four more arrests (two men and two women from the Paris region), and prosecutors indicated that a 39‑year‑old man among them is believed to be the fourth and final member of the robbery team. Several of those detained have since been released for lack of evidence, but at least four suspects remain under formal investigation or charged in connection with planning or executing the robbery.
Early rumors suggested one suspect possessed some of the stolen jewels. Evidently that was not the case.
Official statements now make one thing very clear:
Only one item has been recovered – the small imperial crown of Empress Eugénie, dropped by the thieves during their escape.
The remaining jewels – seven in total – still have not resurfaced.
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A Smithsonian Connection
Like all good stories, this one comes with a surprising twist from Washington, D.C.
Curator Emeritus Jeffrey Post has confirmed that one of the jewels in the National Gem Gallery was once part of a French Royal Jewelry collection. And while some of you may be thinking of the Hope Diamond — yes, it was King Louis XIV's French Blue before being stolen during the revolution (during the reign of King Louis XVI) and recut into the Hope — that is NOT the piece we’re talking about here.
This story centers on a diadem.
Originally set with emeralds as part of an emerald parure... now stolen from the Louvre, the diadem is today set with turquoise and resides safely in the Smithsonian’s National Gem Collection.
Tap here to find out more, and see some much better images!
| | AGTA Spectrum & Cutting Edge Awards |
AGTA Spectrum and Cutting Edge Awards
The IMAGES
We now have them all - and then some!
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Innovative Faceting – Honorable Mention
Dalan Hargrave, GemStarz Jewelry, in collaboration with Robert Glenn and Connie Dixon – 79.75 ct. Ametrine
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Carving – 3rd Place
Meg Berry, Megagem, in collaboration with Meline Gianini (owner) – 88.0 ct. “Grandi Corsage” hand carved Grandidierite
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Classic Gemstone – Honorable Mention
Robert Knupfer, Knupfer International Gems, Inc. – 12.33 ct. yellow emerald-cut unheated Sri Lankan Sapphire
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Classical – Platinum Honors
Jeffrey Bilgore, Jeffrey Bilgore, LLC – Platinum “Drop Dead Ruby Earrings” featuring two oval Mozambique Rubies (6.16 ctw.) accented with Diamonds (2.42 ctw.)
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Business/Day Wear – Honorable Mention
Wolfgang Vaatz, Wolfgang Vaatz – 22K yellow gold, 14K white gold, and 18K yellow gold sheet fused to sterling silver “Expanding” cuff featuring a 4.85 ct. Opal accented by Diamonds (0.614 ctw.)
| | Red Carpet Jewelry Fashion | |
Who Wore What Jewels
At the LACMA
2025 Los Angeles County Museum of Arts, Art + Film Gala
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Covering the 2025 LACMA Art + Film Gala, WhoWoreWhatJewels.com offered a detailed look at the remarkable jewels worn at this year’s fundraiser supporting the Los Angeles County Museum of Art’s exhibitions, acquisitions, and programs.
This year’s gala brought out an impressive range of serious jewelry.
Behind the gowns and spotlights were pieces worth a much closer look — beginning with Doja Cat’s more than 200 carats of Jacob & Co. diamonds, featuring a 35.75-carat fancy yellow radiant-cut, followed by another 200+ carats of Chopard diamonds spread across two major necklaces, chandelier earrings, and rings.
Salma Hayek reportedly debuted a 24.75-carat round-cut tanzanite from Gucci's High Jewelry Collection, while Angela Bassett selected David Webb’s rock crystal pendant and diamond “Angel Wings” earrings.
Damson Idris (above) wore a piece from his own line: an emerald brooch of just over 10 carats, framed by custom-cut tourmalines, with Elle Fanning wearing a Pluie de Cartier diamond necklace delicately dripping with diamonds.
Tap Here for Who Wore What Jewels and their full, star-studded review.
| | Into the Stone Photomicrography from E. Billie Hughes | | |
"One of the beauties of working with gemstones is that each time you peer into a stone, you get a glimpse of the universe held within. When we first examined the scene in a star sapphire, we were delighted with the view.
A feature that immediately stands out is the triangular crystal, which displays terraced growth features and iridescence on the surface when illuminated with a fiber-optic light. Analysis with micro Raman revealed that this crystal is ... ." - Billie Hughes
[take a guess.... then scroll down for the answer]
What makes the scene even more stunning is the way the crystal seems to float over a cloud of rutile silk. This same silk is what creates asterism in the stone, an untreated star sapphire.
E. Billie Hughes, FGA, is a co-founder of Bangkok-based Lotus Gemology, a respected gemological laboratory and educational resource.
Tap Here for all the details!
| | NAJA's 65th ACE©IT Winter Conference in Tucson! | | |
The National Association of Jewelry Appraisers Announces Dates and International Team of Speakers for the Association’s 65th ACE©IT Winter Conference in Tucson.
For decades, hundreds of thousands of gemstone professionals and hobbyists have made the trip to the Tucson Gem shows, often spending weeks, to discover the latest gemological news, market trends, inspirational jewelers, marketing tips, appraisal dos and don’ts and to research prices. This year’s NAJA Tucson Conference features all that and more in one event!
Tucson 2026 marks NAJA’s 65th ACE©IT Conference, which will be held January 30 thru February 1st at the Tucson Convention Center. The conference follows the optional practical hands-on workshop Friday, January 30, 2026 and feature two full days of presentations and hands-on sessions. The robust line-up of experts was invited to present on topics of timely interest for NAJA members.
For the 2026 Tucson Conference, we’ve tapped some longtime favorites of the association and also some new stars to provide attendees with relevant information through hands-on workshops, presentations and plenty of Q&A, that each member can take back and employ immediately in their business practices.
Tap here for more details!
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DeMarco Reports on Sotheby’s Abu Dhabi Auction
Watches & Jewelry pull in $25.4 Million!
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Anthony DeMarco, Senior Contributor for Forbes.com
Dec 06, 2025, 04:07am EST
Sotheby’s closed out its December 5 Abu Dhabi sale with what Anthony DeMarco aptly described as a “white glove” result — every one of the 42 lots from a private collection of important jewels and timepieces found a buyer. The total topped $25.4 million, comfortably above the auction house’s $20 million expectation.
As DeMarco points out, the star of the evening was a complete four-watch set of Patek Philippe Star Caliber 2000 pocket watches — pieces widely regarded as among the most technically ambitious ever produced. The set brought in more than $11.9 million, making it Sotheby’s second-most valuable watch lot ever and the first time an entire Star Caliber 2000 set has appeared at public auction.
But we're not here to talk about watches
Also at this auction were several important colored gem offerings, including the Desert Rose, a 31.68-carat Fancy Vivid Orangy Pink diamond. It sold for $8.8 million.
Read Tony DeMarco’s complete auction report here.
| | OLD IS GOLD THE OPPORTUNITIES IN ESTATE JEWELRY Feature story in The GemGuide | | |
by Brecken Branstrator, GIA GG, Editor-in-Chief, GemGuide.
Estate jewelry is one of the hottest categories in the market right now — offering not only a way to capture new customers, but also a practical way to keep costs down when labor, metal, and gemstone prices are running high. And at the moment, there seems to be no shortage of pieces to work with.
“Estate” has become a true industry buzzword, embraced by wholesalers, appraisers, designers, and retailers alike. The category is proving to be a dynamic answer to several of today’s challenges: high materials costs, tight supply, and the constant need for fresh merchandising angles. It’s giving suppliers and retailers a competitive edge — often with far better margins than newly manufactured goods.
We spoke to Brecken Branstrator, Editor-in-Chief for the GemGuide about this feature story, "Old is Gold."
“This year especially, GemGuide has been hearing about one topic over and over again: estate jewelry," says Branstrator. "It seems to be one of the industry’s hottest categories right now, so we knew we had to dig into the drivers behind that in today’s market. Given the high prices of gold and colored stones, it’s not really that surprising, but the category is also getting a boost from the growing amount of family jewels being handed off to new generations, creating new market activity and opportunities in the area.”
Branstrator interviews several established estate jewelry dealers who shared candid insights into what’s moving, what’s not, and where the opportunities lie for those willing to dig in.
Just as we share auction results here in the Roskin Report to spot emerging trends, Old is Gold hears that both price point and style are two important factors. Maybe it’s a particular ring design gaining traction. Maybe collectors are chasing one of the “big four” gems — emerald, ruby, sapphire, diamond — or veering toward the unexpected gem materials: rock crystal, wood, tourmalines (other than Paraiba), peridot (making a come-back?), or spinel.
The GemGuide's estate feature pairs beautifully with the trends we’re tracking at auction.
Tap here to visit Gemworld International and subscribe to The GemGuide.
| | Professional Gemological Laboratories | | |
GIA to Update Colored Gemstone Reports
More Country of Origin Gems on the List
GIA is Adding Demantoid Garnet, Opal, and Peridot
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GIA, the Gemological Institute of America, will launch redesigned colored stone reports and new services on January 1, 2026. The new reports will feature an elevated design for enhanced storytelling, and expanded origin-determination services.
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New look and more information
"The new colored stone reports will highlight the most relevant gemological information, making it easy for the trade and consumers to grasp the unique characteristics that bring each gem’s story to life."
Expanding the Country-of-Origin list
There is a small but steadily growing list of colored gemstones for which GIA offers country-of-origin. This week, they’re adding three more: demantoid garnet, opal, and peridot — bringing the total to eleven.
GIA will now offer origin-determination services for the following 11 gems:
Alexandrite
Demantoid Garnet
Emerald
Opal
Peridot
Paraíba Tourmaline
Red Spinel
Ruby
Sapphire
... and untreated Jadeite Jade and Omphacite Jade from Myanmar (Burma) or Guatemala.
Strong Research
“Our expanded services are based on GIA’s extensive research and collection of 32,000 samples collected by GIA field gemologists,” said Shane McClure, Global Director of Colored Stone Services.
“The Institute started colored stone reporting more than 75 years ago, and, since then, researchers and gemologists across our laboratories have developed an industry-leading knowledge. This expertise, as well as GIA’s decades-long commitment to research, underpin our report results.”
Q&A
We reached out to Shane McClure to ask whether GIA has a list of potential origin countries for each of the gems listed above, similar to what they’ve stated for jadeite, identifying possible sources such as Myanmar or Guatemala. Could opal, for example, be identified as originating from Australia, Ethiopia, Brazil, or Mexico? Are all of these countries on the list for opal, for example?
"We try to determine origin for as many commercially viable sources as we can for each gem species," states McClure. "For jade, we initially specified Burma and Guatemala because those origins are the primary concerns of the industry. Jade research continues, and at some point, the sources we can test will expand."
So yes — GIA is essentially expanding the scope of their country-of-origin services for colored stones. It may not read like a giant leap to add only three more gems to the list, but for GIA (or for any lab, really) to stick their gemological neck out and assign country-of-origin — even for one gem variety or gem species — represents a significant amount of research, data, and confidence in their work behind the scenes. The trade will most certainly appreciate it; people want stones with known, documented origins.
And with De Beers pushing forward on Origins for diamonds, GIA expanding its colored stone origin capabilities feels like a well-timed parallel movement.
Report Fees
GIA will also revise the weight categories and related fees for colored stone submissions. Details of the new weight and fee structure will be available on GIA.edu on January 1, 2026. The new weight categories and fees will apply to items submitted on or after January 1, 2026. Those items will receive the newly redesigned reports.
Tap here for more information about GIA Laboratory Services
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TOP NEWSLETTER FEATURES
FROM OUR LAST REPORT
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#1.) Sotheby's High Jewelry Geneva Auction
Featuring Fancy Color Diamonds
and No Heat Kashmir Sapphires
The 10.08-carats Fancy Vivid Pink was Pulled.
By Gary Roskin
Roskin Gem News Report
The November Sotheby's Geneva auction highlighted Fancy Vivid color diamonds, including this 4.50 carats Fancy Vivid Blue modified oval mixed-cut, the highlight of the auction, selling for a little over $6 million USD.
There were also these exceptionally large pair (38-carats each!) of matching Fancy Vivid Yellow cushion shape diamond earrings (seen here).
Also on sale were an over abundance of Kashmir no-heat Sapphires, including a square step-cut weighing 10.43-carats, a 7.73-carat square cushion-shape, a 5.98-carat cushion-shape, and a 7.91-carat elongated cushion-shaped sapphire.
The auction also featured several de Grisogono pieces, as well as an invisible-set ruby and diamond flower brooch from Van Cleef & Arpels, signed Van Cleef & Arpels NY, and numbered 45379.
[From our last newsletter feature, "Invisible-Set Genius: Inside the Craft of Oscar Heyman," we now know that this piece is one created by Oscar Heyman for VC&A. - gr]
Tap here to see several items that have gemological significance, and their selling price.
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#2.) France Robbed! The French Crown Jewels
Stolen, Sold, and Stolen Again One Month After the Louvre Heist, Here’s Where We Stand
PLUS: A Gemological Rundown of What was Grabbed
Gary Roskin Roskin Gem News Report
It has now been one month since four men, disguised as construction workers, bright orange vests and all, drove a compact ladder truck up to the Louvre, extended the lift to a three-story balcony of the Galerie d’Apollon, cut through a window, and in under seven minutes stole eight pieces of France’s Crown Jewels.
What looked, at first, like a surreal movie plot, has since hardened into a sobering reality: seven of those jewels remain missing, and the investigation has exposed significant cracks in France’s museum-security armor.
Arrests & Investigations
French authorities have now arrested seven individuals, with four formally placed under investigation for organized theft and conspiracy. Among them is a former Louvre security guard, a revelation that understandably raises concerns about insider knowledge. One suspect was detained at Charles-de-Gaulle Airport attempting to leave the country.
Early rumors suggested he possessed some of the stolen jewels. Official statements now make one thing very clear:
Only one item has been recovered — the small imperial crown of Empress Eugénie, dropped by the thieves during their escape.
The remaining jewels — seven in total — have not resurfaced.
Tap here to read the full story:
“The French Crown Jewels — Stolen, Sold, and Stolen Again.”
One Month Later...
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#3) Into the Stone:
Photomicrography from E. Billie Hughes
Here we have a close-up of a “fingerprint” inclusion in a Madagascar sapphire, shown before-and-after heat treatment. In this paired photomicrograph series by E. Billie Hughes, you can see exactly the kind of detail gemologists rely on when assessing evidence of treatment.
These before-and-after shots are remarkable — not only for what they reveal gemologically, but for the precision of the presentation seen here. To have two images line up this perfectly, allowing you to pinpoint every shift and subtle change, is truly extraordinary.
We spoke with Billie, who explained just how demanding this kind of work can be.
“It does take an extraordinary amount of time and patience to get these before-and-after shots as close to each other as possible,” says Hughes.
“I can share a few pieces of advice." ...
Yes - we're making you Tap Here to read those words of wisdom,
as well as see these images close up!
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ANSWER:
Into the Stone Photomicrography from E. Billie Hughes
Apatite
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| | Gemmological Association of Great Britain | | Gemmological Association of Australia | | |
Bear Essentials
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Lotus Gemology
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World Gem Foundation
Cushman Allerton & Co.
Gemworld International
GIA - Gemological Institute of America
The Canadian Gemmological Association
AGTA - the American Gem Trade Association
GAA - Gemmological Association of Australia
AGA - the Accredited Gemologists Association
Gem-A - Gemmological Association of Great Britain
NAJA - the National Association of Jewelry Appraisers
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What do we have for you this week?
SO much news and just not enough time to cover it all!
Thanks to our advertisers who keep this newsletter free!
Want us to cover something? Let us know!
Our email address is Gary@RoskinGemNews.com
- or you can text us at +1-610-269-0121 (good for WhatsApp too!)
That's all for now from here!
Keep in touch. We’d love to hear where you’ve been and what gems you’ve discovered!
As always, we will continue to post features on the website, so feel free to log on to the Roskin Gem News Magazine any time: www.RoskinGemNewsReport.com
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Want to contribute?
If you would like to contribute, or you have read something somewhere that you feel would be perfect to share with the community, then please feel free to contact me directly at Gary@RoskinGemNews.com
I will see you again SOON!
Stay safe and stay healthy!
Gary Roskin
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| The creation of this newsletter is the work of Gary A. Roskin Ltd, dba Roskin Gemological Services. If you should have any comments or suggestions regarding the contents of this newsletter, please do not hesitate to contact us at Gary@RoskinGemNews.com | |
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