Grading

Gem Cutting Expert Al Gilbertson Wins Bonanno Award

GradingNov 22, 2016

Gem Cutting Expert Al Gilbertson Wins Bonanno Award

The Accredited Gemologists Association has chosen the project manager of cut research at the GIA’s Carlsbad laboratory as the recipient of the 2017 Antonio C. Bonanno Award for Excellence in Gemology.

20161122_Al-Gilbertson.jpg
Al Gilbertson, currently Project Manager, Cut Research at the GIA, will receive the 2017 Antonio C. Bonanno Award for Excellence in Gemology at the end of the organization’s Tucson conference in February.

San Diego--The Accredited Gemologists Association has announced that Al Gilbertson of the Gemological Institute of America will receive the 2017 Antonio C. Bonanno Award for Excellence in Gemology.

The Bonanno Award recognizes those who have made significant contributions to the gemological field. Recipients are selected by a majority vote of the AGA membership.

Gilbertson is Project Manager, Cut Research at the GIA’s Carlsbad laboratory, continuing an extensive career that includes contributions in appraisal science, color communication and cut research. 

He is also an accomplished gem cutter who grew up in the lapidary business, according to the AGA. 

Early in his career, Gilbertson lobbied members of the board of the American Gem Society to establish a new firm designation for independent jewelry appraisers.

In 1992, he and former GIA instructor Jim Coote were the first to receive, and help set the standards for, the Independent Certified Gemologist Appraiser Firm designation. They were also the first independent appraisers to be awarded the title of Certified Gemologist Appraiser by the American Gem Society. 

As well as being published, Gilbertson has presented a number of lectures and workshops for jewelers, gemologists and appraisers. He also has several patents pertaining to aspects of gem cutting and light performance.

As a member of the gemological committee that helped set up the AGS lab, he developed the tools that became the core of the AGS ASET light performance model.


The GIA hired Gilbertson in 2000 to be a part of its team to research diamond cut evaluation, and he became an important part of the group that created the institute’s cut grading system for round brilliant diamonds.

Currently, he is studying the influence of proportions and other factors on the appearance of fancy shape diamonds, working towards a cut grading system for them. His book, American Cut: The First 100 Years, is regarded as the standard work on the subject, AGA said.

“Al Gilbertson continues in a career that has already made an incredible impact on this industry. The generous manner in which he shares his knowledge with both student and veteran industry members alike is clearly appreciated by our members,” AGA President Stuart Robertson said.

The Antonio C. Bonanno Award for Excellence in Gemology will be presented at AGA’s gala dinner dance at the end of its Tucson conference on Wednesday, Feb. 1. at the Marriott University Park Hotel.

The award includes a personalized plaque and a $2,000 research honorarium funded by the AGA membership.

For additional information or to attend the conference or gala, visit AccreditedGemologists.org or call 619-501-5444.

Previous recipients of the award include Cigdem Lule, Thomas Hainschwang, John Emmett, Emmanuel Fritsch, Thom Underwood, Stuart Robertson, Richard Hughes, Christopher Smith, James Shigley, Shane McClure, Richard Drucker, Alan Jobbins and Antoinette Matlins.
Ashley Davisis the senior editor, fashion at National Jeweler, covering all things related to design, style and trends.

The Latest

26.36 carat round brilliant cut
AuctionsMar 11, 2026
‘Spectacular’ 26-Carat Diamond Going Up for Auction in London

The largest white diamond to come to market in the U.K. in more than a decade, the VVS1, I-color stone is expected to top $1 million.

Cast Compass pendant
TechnologyMar 11, 2026
Cast Jewelry’s Rachel Skelly on Coming Back Online Only

Skelly shares her plans for reimagining the fine jewelry retailer she re-acquired after it faltered last year.

Pyrrha The Space Between Campaign
CollectionsMar 11, 2026
Pyrrha Highlights ‘The Space Between’ In New Collection

The collection takes inspiration from the emotional space between people, moments, and experiences.

TopImageCrop.jpg
Brought to you by
Is This You? Every Jeweler Has This Problem; We Have the Solution.

Every jeweler faces the same challenge: helping customers protect what they love. Here’s the solution designed for today’s jewelry business.

Charles London, Mayer and Fran Udell, Mark and Candy Udell
IndependentsMar 11, 2026
From the Jazz Age to the Information Age: London Jewelers Turns 100

In 2026, the jewelry retailer is celebrating a milestone only a small percentage of family-owned businesses survive to see.

Weekly QuizMar 05, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Virginia jewelers at charity ball
IndependentsMar 11, 2026
Virginia Jewelers Raise Nearly $30K for Children’s Hospital

The group of jewelers held a jewelry raffle in support of the Children’s Hospital of Richmond at VCU.

Stack of gold bangles on denim
FinancialsMar 10, 2026
Signet Jewelers’ Q4 Sales Fall Flat

The jewelry giant released preliminary results for the fourth quarter and full year on Monday, with final results slated to come next week.

dca-laptop.jpg
Brought to you by
DCA Enters a New Chapter in Jewelry Education

With refreshed branding, a new website, updated courses, and a pathway for growth, DCA is dedicated to supporting retail staff development.

Saks Fifth Avenue door sign
MajorsMar 10, 2026
Saks Global to Close 15 More Stores

The retailer also gave an update on its vendor partnerships.

Julianne Moore
TrendsMar 10, 2026
Messika Names Julianne Moore as Ambassador

The award-winning actress is the “epitome of modern allure,” the brand said.

Sorellina Large Bloom Inlay Pendant
CollectionsMar 10, 2026
Gemstones ‘Bloom’ in Sorellina’s New Collection

The “Bloom” collection draws from the flower power movement of the 1960s and ‘70s with inlay pendants offered in eight colorways.

Constellations Over the Sedona
Events & AwardsMar 10, 2026
Diamond-Studded Painting Shines at RJO Foundation Auction

The unique piece was one of the custom works offered at the foundation's recent silent art auction, which garnered nearly $15,000 in total.

Jake Gyllenhaal as Bulgari Brand Ambassador
TrendsMar 09, 2026
Jake Gyllenhaal Is Bulgari’s Latest Ambassador

Bulgari named Gyllenhaal as its brand ambassador for his embodiment of artistic depth, intellectual curiosity, and warmth.

TJS scholarship winners 2026
Events & AwardsMar 09, 2026
TJS Announces 2026 Scholarship Winners

Awards were given to four students, one apprentice, and an emerging jeweler.

Model wearing diamond necklace and ring
AuctionsMar 09, 2026
Joanna Carson’s Jewels Lead White-Glove Sale

The top jewelry lot of the late model’s estate sale, hosted by John Moran Auctioneers, was an Oscar Heyman & Brothers for Cartier necklace.

Charles & Colvard showroom in Morrisville, North Carolina
Lab-GrownMar 06, 2026
Charles & Colvard Files for Bankruptcy, Citing Price Pressures

Increased competition, falling lab-grown diamond and moissanite prices, and the rising cost of gold took a toll on the moissanite maker.

Zome Solara Earrings
CollectionsMar 06, 2026
Zome’s ‘Solara’ Earrings Embody Celestial Beauty

The earrings, our Piece of the Week, feature pink tourmalines as planets orbiting around an aquamarine center set in 18-karat rose gold.

Pomellato’s International Women’s Day “The Price of Freedom” Campaign
MajorsMar 06, 2026
Pomellato’s 2026 IWD Campaign Spotlights Economic Abuse

“The Price of Freedom” campaign video for International Women’s Day confronts the quiet violence of financial control.

Stock image of shipping containers
Policies & IssuesMar 05, 2026
Tariffs to Increase to 15% This Week, Treasury Secretary Says

Also, a federal judge has ordered that companies that paid tariffs implemented under the IEEPA are entitled to refunds.

Common Era Difficult Women Pandora Pendant, Anne Boleyn Signet Ring, Cleopatra Pendant
CollectionsMar 05, 2026
Common Era Honors ‘Difficult Women’ in Collection

The ever-growing collection, which just expanded with the addition of Olga of Kyiv, features cameos of 12 women from history.

Diamond engagement rings by designer Lorraine West
TrendsMar 05, 2026
Engagement Ring Trends 2026: What’s In, and Why

We asked a jewelry historian, designer, bridal director, and wedding expert what’s trending in engagement rings. Here’s what they said.

American Gem Society Conclave 2026 Orlando logo
Events & AwardsMar 05, 2026
AGS Announces Conclave 2026 Speaker Lineup

The annual event will be held in Orlando, Florida, from Sept. 14-17.

Caitríona Balfe on Only Natural Diamonds Spring 2026 Issue Cover
TrendsMar 05, 2026
Caitríona Balfe Fronts Only Natural Diamonds Cover

The “Outlander” star modeled for the digital cover of the magazine’s spring issue, which features a story on her relationship with jewelry.

CIBJO Milan
MajorsMar 05, 2026
Registration Opens for CIBJO Centenary Congress

This year’s annual congress, which will mark the confederation’s 100th anniversary, will take place this fall in Italy.

Michael M Beverly Hills Flagship Interior Rendering
MajorsMar 04, 2026
Michael M Opens First Store

Beverly Hills was chosen as the location for the brand’s first store, designed as a “private residence for modern monarchs.”

Dubai mall
Policies & IssuesMar 04, 2026
Luxury Brands Temporarily Shutter Middle East Stores

Kering, Apple, and other retailers have reportedly temporarily closed stores in the Middle East region in light of the recent conflicts.

Brilliant Earth Beverly Hills showroom
EditorsMar 04, 2026
Q&A: Brilliant Earth’s CEO on the New Beverly Hills Store

Beth Gerstein discusses the vibe of the new store, what customers want when fine jewelry shopping today, and the details of “Date Night.”

×

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