Jeffery Bergman, SSEF SGC
Vice President EmeritusJeffery Bergman, SSEF SGC, founder and director of 8th Dimension Gems in Thailand, is an American gem dealer with more than 40 years of experience in gemstone and fine jewelry mining, cutting, wholesaling and retailing. His career has taken him to more than 50 countries and every continent except Antarctica. He has appeared on the BBC, CNN, NBC, ABC and GEO; and has been featured in Time, USA Today, National Geographic, Gems & Gemology and Discovery Channel magazine. He is a regular guest speaker at gem lab seminars and gemological association conferences and universities.
Articles by Jeffery Bergman, SSEF SGC
Broken Bangle — The Blunder-Besmirched History of Jade Nomenclature: Book Review
Is fei cui a better term for "pyroxene jade" than jadeite? Jeffery Bergman reviews Broken Bangle, a new book on...
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What is Jedi Spinel?
Jedi spinel makes a beautiful jewelry stone. Learn how it got its name and what qualities make this vivid pinkish...
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Gübelin Grades an Exceptional Vietnamese Ruby with “Pigeon’s Blood” Color
How does Vietnamese ruby compare to Burmese ruby? Learn about the "Red Treasure" of Vietnam and why even experts can...
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Gem Origin Opinions: When Gemology Labs Agree to Disagree on Sapphire Origins
Why do gemology labs sometimes have different gem origin opinions, especially for sapphires? Learn the science and history behind the...
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The World’s Largest Emeralds
Emerald crystals can grow very large. Learn about some of the world’s largest emeralds, whether rough, faceted, or carved.
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Buyer Beware: Closer Examination of the Burj Alhamal Ruby Casts Doubt on its $120 Million Valuation
April 21, 2022
An astonishing record-breaking rough ruby of 8,400 carats, weighing 2.8 kilograms, from Winza, Tanzania has gone on...
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Emerald Transformation: Cleaning and Recutting a Natural Emerald
To meet the demand for fine emeralds with no clarity enhancements, dealers search for gems to clean and recut. Learn...
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Emerald Myth Busters: Identifying Colombian Stones
Colombian emeralds can command premium prices. Jeffery Bergman separates emerald myth from fact when it comes to determining the origins...
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Ruby-Glass Composites vs Leaded Glass Clarity Enhancements
Ruby-glass composites and leaded glass ruby clarity enhancements are difficult for gemologists to detect. Learn how to identify these gems...
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Is the 500-Pound Beleza Emerald Really Worth $280 million?
A couple claims the Beleza Emerald was lost in the Camp Fire of 2018 and was worth $280 million. The...
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Emerald Enhancements: A Consumer and Trade Guide
Almost all cut emeralds have had clarity enhancements. Learn how these emerald enhancements work, what substances are used, and how...
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The Sacred Emerald Buddha
Carved in Thailand in 2006 from a 3,600-ct emerald, “The Sacred Emerald Buddha” has a message of peace. Read the...
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Fake News in the Gem Trade: A Waterworn Emerald from Chivor?
A number of online sites have reported on a large emerald, supposedly recently extracted from the Chivor mine in Colombia....
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800 Years of Mogok: A Celebration in Tenuous Times
As Mogok, Myanmar prepares to celebrate its 800th anniversary, the inhabitants of this prolific gem producing region face an uncertain...
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The worlds largest cut cats-eye chrysoberyl
The Eye of the Lion.This Cats-Eye Chrysoberyl is the largest cut example in the world(as documented by the Smithsonian Institute)with...
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