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

Mikimoto L'éclat high jewelry brooch
SurveysJul 27, 2026
Jewelry Leads Luxury Market Amid Stabilization, Bain Says

Bain & Company delved into the trends shaping the luxury market, the impact of AI, and more in its recent study.

Harvard Rubies Exhibit The Soul of Flame II Brooch by Austy Lee
SourcingJul 27, 2026
‘Rubies’ Goes on Display at Harvard Museum

The exhibition reveals the gemology, geology, and cultural history of the iconic red gemstone.

Stock image of shipping containers in port
Policies & IssuesJul 24, 2026
New Trump Tariffs: What They Mean for Jewelry

The new sweeping slate of tariffs impacts 60 countries, including India, China, Thailand, Hong Kong, and the United Arab Emirates.

Brought-To-By-Article-Top-Image.jpg
Brought to you by
Wedding Band Trends 2026: Personalization Takes Center Stage

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

Jorge Adeler Gods & Heroes coin pendant
TrendsJul 24, 2026
Amanda’s Style File: Ode to ‘The Odyssey’

From coin pendants to diamond shields, these old world-inspired jewels are the perfect accessory for an epic journey.

Weekly QuizJul 23, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Courtney Leidy Amethyst Silk Cord Pendant
TrendsJul 24, 2026
Courtney Leidy’s Silk Cord Pendants Center Unexpected Pairings

Our Piece of the Week pairs a checkerboard-cut amethyst with an ivy green silk cord.

NJ Article image.png
PodcastsJul 23, 2026
Episode 7: Reinhold Jewelers on the Power of Relationships

Mildred Marcano Abrams and Yael Reinhold join the podcast to talk community connections, holiday plans, and preserving Reinhold’s legacy.

DCA-NJ-article-1872x1052-060826.jpg
Brought to you by
Building the Future of Jewelry Retail: DCA Expands Education, Leadership Development, and Workforce Solutions

DCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.

Trucks at De Beers’ Orapa mine in Botswana
SourcingJul 23, 2026
De Beers’ Production Jumps 88 Percent in Q2

Production also was up in the first half of 2026 but is expected to “substantially” decrease in H2 as two key mines undergo maintenance.

Silvia Furmanovich Enchapado en Tamo Wooden Wheat Straw Sun Earrings
CollectionsJul 23, 2026
Silvia Furmanovich’s New Collection Travels Back to the 1920s

“Art Deco” fuses ancestral techniques, rare materials, and modern perspectives as a tribute to the optimism and curiosity of the movement.

Sissy’s Log Cabin Saracen Casino
IndependentsJul 23, 2026
Sissy's Log Cabin Opens Casino Store

The jeweler’s newest store is inside Arkansas’ Saracen Casino Resort.

Kate Spade New York watches
WatchesJul 23, 2026
Movado Inks Licensing Deal With Kate Spade New York

The watch company will design, manufacture, and distribute Kate Spade New York watches.

Stock photo of loose polished diamonds
Policies & IssuesJul 22, 2026
Trump to Put 50% Tariff on Canadian Goods

The higher tax is set to go into effect in August and will apply to loose polished diamonds as well as precious and base metals jewelry.

Monica Rich Kosann Enchanted Garden Cherry Necklace
CollectionsJul 22, 2026
Monica Rich Kosann’s High Jewelry Is Fruitful

The “Enchanted Garden” series features a cherry, lemon, and pear that each hold a little secret inside.

Liljenquist new Rolex boutique McLean Virginia
IndependentsJul 22, 2026
Liljenquist Beckstead Opens Rolex New Boutique

It’s located in Tysons Galleria, an upscale shopping center in the Washington, D.C., metro area.

NY Now exhibitor booth
Events & AwardsJul 22, 2026
NY Now Returns in August Under New Ownership

The show, recently acquired by Rockview Management Group, will be held at New York City’s Javits Center from Aug. 2-4.

The Retail Smith Principal Partner and National Jeweler columnist Sherry Smith
ColumnistsJul 21, 2026
Sherry Smith: Shattering the Illusion of the ‘Either/Or’ Diamond Market

Smith offers retailers guidance on creating an environment where natural and lab-grown diamonds can both thrive.

Emerald logo
Events & AwardsJul 21, 2026
Apollo Funds Completes Emerald Acquisition

Former Emerald President and CEO Hervé Sedky has transitioned to the role of senior advisor.

Graff Seraphina Brooch and Lina Pendant
CollectionsJul 21, 2026
Graff’s New Butterfly High Jewelry Brooches Metamorphosize

The 12-piece capsule collection transforms from brooches to pendants.

Rough diamonds from De Beers’ Gahcho Kue mine in Canada
SourcingJul 21, 2026
Anglo Reportedly Selects Gareth Penny’s Consortium as Top Bidder for De Beers

A Botswana government official told lawmakers Anglo has selected The Global Diamond Consortium, an entity chaired by Penny, to buy De Beers.

Stock image of shipping containers
Policies & IssuesJul 20, 2026
Tariffs on Brazil to Increase But Rough Gemstones Exempt

The new tariff, imposed after a Trump administration study, is 25 percent and will stack on top of existing tariffs.

Vhernier Freccia High Jewelry Necklace
CollectionsJul 20, 2026
Vhernier Transforms ‘Freccia’ Collection Into High Jewelry

The collection from 2014 has been reinterpreted into high jewelry with its signature triangular-shaped elements.

Krista Collins Walters
MajorsJul 20, 2026
Krista Collins Walters Promoted to Publisher of Instore

She will also take on the role of vice president of jewelry for SmartWork Media, a newly created position.

Attendees at the Jewelry Symposium
Events & AwardsJul 20, 2026
TJS Accepting Speaker Proposals for 2027 Event

Organizers are looking for presentations on topics like manufacturing, technology and research, bench work, gemstones, and sustainability.

HOWL Frida Venetian Glass Collar
CollectionsJul 17, 2026
HOWL Taps Shailene Woodley for ‘Home Sweet Home’ Campaign

Woodley is seen in the campaign wearing our Piece of the Week, the “Frida” collar featuring 13 pieces of hand-carved Venetian glass.

A diamond ring in a jewelry box
SourcingJul 17, 2026
U.K. Woman Pays £5 for £15K Diamond Ring at Car Boot Sale

A WeBuyVintage jewelry expert uncovered how much the flea market find was actually worth.

Unveiling Rarities
SourcingJul 17, 2026
Diamond Dealer Jeff Pancis Pens Memoir

The founder of natural colored diamond wholesaler Pancis Gems shares stories from his five decades in the industry.

×

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