Sourcing

Beyond Borders: Crucial Factors in Colored Stone Origin Determination

Brought to you by

Beyond Borders: Crucial Factors in Colored Stone Origin Determination

Navigate origin determination with Continuing Education seminars offered by the GIA Alumni Collective™.

Cover-WN19-Back-&-Front_V5-RGB-(1)_Community.jpg

Brought To You By GIA Alumni Collective™


The value of high-end colored stones can increase dramatically depending on their origins, making 'country of origin' a critical value factor, alongside stone quality factors such as color, size, and shape. What does it take to make accurate, authoritative origin determinations? 

Comprehensive Sample Collections

GIA’s field gemologists travel the world investigating mines and collecting samples for GIA’s unrivalled gemstone reference collection. With 26,002 colored gemstone samples and counting, including corundum, emeralds, spinels, alexandrites, and more, GIA’s reference collection only continues to grow. These gems are meticulously documented and researched. As databases expand and more information is gathered, previously held beliefs about geographic origin criteria may shift. For instance, the assumption that orange fluorescence in blue sapphires solely indicated a Sri Lankan origin was debunked when GIA researchers uncovered its presence in multiple low-iron metamorphic deposits.

Advanced Scientific Instruments

Advanced instruments are imperative for laboratories that issue geographic origin reports. As these instruments become increasingly sophisticated, more expertise is required to operate them. This is especially true for certain chemical analysis techniques, such as laser ablation. The cost of such equipment may be prohibitive for smaller labs, but GIA labs utilize the most premium microscopes and spectroscopy instruments to ensure accurate determinations. 
 
Manuel-Marcial-de-Gomar-emeralds-636x358.jpg

Geography Versus Geology

Interesting fact: Did you know that gem deposits are determined by geology, not geography? Country boundaries don't affect where gems form, and gemstones from different deposits may possess similar properties. For example, some blue sapphires from Myanmar are practically indistinguishable from those originating in Sri Lanka. Understanding these technicalities is vital for accurate gemstone assessments.
 
95956 Myanmar Ruby rough polish.jpg

Continued Education Opportunities with GIA Alumni Collective

The GIA Alumni Collective's Country of Origin seminars covering ruby, sapphire, and emerald offer professionals the chance to learn from field researchers dedicated to these studies. The seminars introduce topics like global colored stone deposits, advanced analysis techniques, and origin reference collection building. Interactive sessions, live demonstrations, and digital reference materials provide an engaging and comprehensive learning experience, including fascinating case studies. 

Understanding the complexities of country of origin determination is a challenging yet crucial aspect of the gemstone trade. By participating in these comprehensive seminars, attendees can gain critical insights into the value and provenance of gemstones to make more informed decisions in this rapidly-evolving industry.

Visit collective.gia.edu/continuing-education to explore the seminars.

The Latest

Saks on Amazon flagship window
MajorsMay 16, 2025
Saks Fifth Avenue, Amazon Partner on Luxury Online Storefront

Plus, parent company Saks Global announces plans to cut ties with up to 600 vendors.

Graphic for My Next Question webinar with guest Peter Smith
Recorded WebinarsMay 16, 2025
Watch: Physical Retail Is Not Dead

Peter Smith joined Michelle Graff to chat about the state of brick-and-mortar stores and share a few book and podcast recommendations.

Tejen Candy Bowl Torque Necklace
CollectionsMay 16, 2025
Piece of the Week: Tejen’s ‘Candy Bowl’ Torque Necklace

The necklace features a candy-colored Australian white opal in 18-karat Fairmined gold, as the brand was named a Fairmined ambassador.

antique_Vegas_2024_by_headshot_stories_9454.jpg
Brought to you by
Las Vegas Antique Jewelry & Watch Show: Showcasing the Most Collectible Merchandise from Across the Globe

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

1 Camilla Dietz Bergeron.jpg
Supplier BulletinMay 15, 2025
Treasure Hunting at the Las Vegas Antique Jewelry and Watch Show

Sponsored by the Las Vegas Antique Jewelry and Watch Show

Weekly QuizMay 15, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
The Mediterranean Blue diamond
AuctionsMay 15, 2025
'The Mediterranean Blue' Diamond Sells for $21M at Sotheby’s

A private American collector purchased the 10-carat fancy vivid blue diamond.

Jessica McCormack Fruit Salad Campaign Imagery
CollectionsMay 15, 2025
Jessica McCormack’s ‘Fruit Salad’ Collection Is Fresh for Summer

The designer has taken the appeal of freshly picked fruit and channeled it into a capsule collection of earrings, necklaces, and pendants.

Supplier Spotlight -Recorded-Webinar.png
Brought to you by
Watch: The Winston Red: GIA Examines the Smithsonian’s Newest Addition

Supplier Spotlight Sponsored by GIA

Disability advocate Catarina Rivera, JVC ADA compliance guide, circle of hands wearing jewelry
Policies & IssuesMay 15, 2025
State of Retail: How to Better Serve Customers With Disabilities

Around 54 million Americans and counting live with a disability. Here’s how to make your jewelry store and website more accessible.

Sekou Andrews
Events & AwardsMay 15, 2025
Poet Sekou Andrews to Give Closing Keynote at Converge

The event is also accepting poster submissions now through June 16.

Pope Francis
Policies & IssuesMay 14, 2025
Here’s What Happened to Pope Francis’ Ring

Before Pope Leo XIV was elected, a centuries-old procedure regarding the late pontiff’s ring was followed.

1998 Cosmograph Daytona, Ref.16516 Rolex
AuctionsMay 14, 2025
Custom Rolex Pulled From Sotheby’s Sale

The one-of-a-kind platinum Rolex Cosmograph Daytona was estimated to fetch up to $1.7 million.

Jeweler Constance Polamalu at Bloomstone, a store that specializes in lab-grown diamonds
Lab-GrownMay 14, 2025
State of Diamonds: What’s Next for Lab-Grown Diamonds?

While the product has entrenched itself in the market, retailers and consultants are assessing the next phase of the category’s development.

Surveillance footage Tiffany & Co. Seattle robbery
CrimeMay 14, 2025
Seattle Detectives Seek Public’s Help in Tiffany & Co. Robberies

The police are trying to identify the man suspected of robbing two Tiffany & Co. locations in the area.

Jeff Corey, new chairperson of the board for the Jewelers Board of Trade
MajorsMay 14, 2025
Jeff Corey Elected Chair of JBT Board

The well-known Maine jeweler takes over for Brian Fleming and will serve a one-year term.

Foundrae Ingot Pendant
Policies & IssuesMay 14, 2025
Foundrae Donates $11K to Ethical Metalsmiths

The donation was the result of the brand’s annual Earth Day Ingot event.

Eiseman Jewels ribbon cutting ceremony
IndependentsMay 13, 2025
Eiseman Jewels’ Renovated Dallas Store Is Bigger and Better

Located in NorthPark Center, the revamped store is nearly 2,000 square feet larger and includes the first Tudor boutique in Dallas.

Diamond Council of America
MajorsMay 13, 2025
DCA Announces New Learning Platform, Course Updates

The nonprofit has made updates to the content in its beginner and advanced jewelry sales courses.

Malyia McNaughton and Elyssa Jenkins-Pérez
MajorsMay 13, 2025
BIJC Launches New Education Fund

BIJC President Malyia McNaughton will shift roles to lead the new foundation, and Elyssa Jenkins-Pérez will succeed her as president.

Harwell Godfrey Snake Giza Ring, Foundrae Mind, Body Soul Story Necklace, Tiffany & Co. Tiffany Titan By Pharrell Williams Bracelet
TrendsMay 13, 2025
State of Jewelry Design: The Top 10 Jewelry Trends of the Past Decade

As a nod to the theme of JCK Las Vegas 2025, “Decades,” National Jeweler took a look back at the top 10 jewelry trends of the past 10 years.

Lightbox’s Reminiscence Poet earrings in 14-karat white gold with lab-grown diamonds
Lab-GrownMay 12, 2025
Lightbox to Go Dark by Summer, De Beers Says

The company plans to halt all consumer-facing activity this summer, while Lightbox factory operations will cease by the end of the year.

Stock image of shipping containers
Policies & IssuesMay 12, 2025
Tariffs on Chinese Imports Temporarily Slashed as U.S.-China Reach Deal

Following weekend negotiations, the tax on Chinese goods imported into the United States will drop by 115 percent for the next 90 days.

Artists’ Jewelry: From Cubism to Pop, the Diane Venet Collection
Events & AwardsMay 12, 2025
Jewelry By Picasso, Dalí on Display at Florida Art Museum

“Artists’ Jewelry: From Cubism to Pop, the Diane Venet Collection” is on view at the Norton Museum of Art through October.

2025 CASE Award Submission Graphic
Events & AwardsMay 12, 2025
CASE Awards Now Accepting Entries For 2025

The deadline to submit is June 16.

Lugano Diamonds store in Greenwich, Connecticut
IndependentsMay 09, 2025
Lugano Diamonds CEO Resigns Amid Internal Investigation

Moti Ferder stepped down Wednesday and will not receive any severance pay, parent company Compass Diversified said.

Coeur Percé Scapular Necklace and Love Baby Locket
CollectionsMay 09, 2025
Pieces of the Week: Marie Lichtenberg’s Collaborations for Mother’s Day

Lichtenberg partnered with luxury platform Mytheresa on two designs honoring the connection between mothers and daughters.

Stock image of a man’s hands in handcuffs
CrimeMay 08, 2025
Former NYC Jewelry Store Employee Arrested in 2017 Choking Death of Boss

Michel Desalles allegedly murdered Omid Gholian inside World of Gold N Diamond using zip ties and then fled the country.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy