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

Stock image of gavel
CrimeDec 15, 2025
Men Receive Life Sentences in Home Invasion Murder of Jeweler

Carlos Jose Hernandez and Joshua Zuazo were sentenced to life without the possibility of parole in the 2024 murder of Hussein “Sam” Murray.

Eduard Stefanescu, left, and Sara Yood, right
Policies & IssuesDec 15, 2025
Sara Yood Named Co-Chair of RJC Standards Committee

Yood will serve alongside Eduard Stefanescu, the sustainability manager for C.Hafner, a precious metals refiner in Germany.

MS Rau Aspen rendering
IndependentsDec 15, 2025
M.S. Rau to Open Store in Aspen

The New Orleans jeweler is also hosting pop-up jewelry boutiques in New York City and Dallas.

Recipients Collage 2025 - NJ (1872 x 1050 px) (1872 x 1052 px).png
Brought to you by
Impacting Tomorrow Today

How Jewelers of America’s 20 Under 40 are leading to ensure a brighter future for the jewelry industry.

Tiffany & Co. Paraíba tourmaline jewelry
AuctionsDec 12, 2025
13.54-Carat Paraíba Tourmaline Sets Records at Christie’s

Set in a Tiffany & Co. necklace, it sold for $4.2 million, the highest price and price per carat paid for a Paraíba tourmaline at auction.

Weekly QuizDec 11, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
David Webb holiday window
MajorsDec 12, 2025
David Webb Reveals Ice-Cold Holiday Window Display

The jeweler’s “Deep Freeze” display showcases its iconic jewelry designs frozen in a vintage icebox.

Oscar Heyman Yellow Green Sphene and Diamond Ring
CollectionsDec 12, 2025
Piece of the Week: Oscar Heyman’s Sphene Ring

Take luxury gifting to new heights this holiday season with the jeweler’s showstopping 12-carat sphene ring.

roseco-catalog.png
Brought to you by
Roseco Releases New Full-Line Catalog

Roseco’s 704-page catalog showcases new lab-grown diamonds, findings, tools & more—available in print or interactive digital editions.

IGI Design Contest Graphic
Events & AwardsDec 12, 2025
IGI Jewelry Design Contest Now Accepting Submissions

This year's theme is “Unveiling the Depths of the Ocean.”

Jacquie Aiche Alien Heart Eye Inlay Necklace, Cicada Dragonfly Brooch, Harkness After the Rain Earrings
TrendsDec 11, 2025
Pinterest 2026 Trend Report: Brooches, Bold Gold, Cool Blue

In its annual report, Pinterest noted an increase in searches for brooches, heirloom jewelry, and ‘80s luxury.

Day’s Jewelers Salem New Hampshire store exterior
IndependentsDec 11, 2025
Look Inside Day’s Jewelers’ Ninth Store

The 111-year-old retailer celebrated the opening of its new location in Salem, New Hampshire, which is its third store in the state.

Americas Gold Chain Catalog Volume 3
MajorsDec 11, 2025
Americas Gold Releases New Gold Chain Catalog

The new catalog features its most popular chains as well as new styles.

F.P. Journe FFC prototype
AuctionsDec 10, 2025
Francis Ford Coppola’s Watch Sells for $10.8M

The filmmaker’s personal F.P. Journe “FFC” prototype was the star of Phillips’ recent record-setting watch auction in New York.

Rolex Miami store
WatchesDec 10, 2025
There’s A New Rolex Boutique in Miami

The new location in the Design District pays homage to Miami’s Art Deco heritage and its connection to the ocean.

Stock image of consumers shopping in the winter
SurveysDec 10, 2025
Consumer Confidence Drops in November

Inflations, tariffs, and politics—including the government shutdown—were among consumers’ top concerns last month.

National Association of Jewelry Appraisers logo
SourcingDec 10, 2025
NAJA Announces Details for 2026 ‘Ace It’ Winter Conference

“Longtime favorite” presenters, as well as first-time speakers, will lead talks and workshops at the annual event in Tucson next year.

Silas Smith and his Responsible Design Challenge Winning Pendant
Events & AwardsDec 10, 2025
MJSA Names 2025 Responsible Design Challenge Winner

Silas Smith of Meridian Metalworks won the challenge with his pendant that blends Australian and American landscapes.

Sothebys orangy pink The Desert Rose diamond
AuctionsDec 09, 2025
‘Desert Rose’ Diamond Sells for $8.8M in Abu Dhabi

The sale of the 31.68-carat, sunset-hued stone was part of Sotheby’s first series of events and auctions in Abu Dhabi.

National Jeweler columnist and Smart Age Solutions CEO Emmanuel Raheb
ColumnistsDec 09, 2025
Holiday Sales Happen in December, Most Decisions Don’t

Most customers who walk into your store this month have made up their minds. Your job is to validate their choice, Emmanuel Raheb writes.

Guzema Once Upon a Time Collection Campaign
TrendsDec 09, 2025
‘Once Upon a Time,’ Guzema Debuted Its Holiday Collection

The collection features characters and motifs from Ukrainian folklore, including an enchanted mirror and a magic egg.

Gemvision by Stuller MatrixGold 3.11
TechnologyDec 09, 2025
Gemvision Releases Updated MatrixGold

MatrixGold 3.11, the newest version of the jewelry design program, offers more flexibility, precision, and creative control.

Sign at the JA New York jewelry trade show
Events & AwardsDec 09, 2025
MJSA Showcase Pavilion Returning to JA New York

The pavilion will be part of the 2026 JA New York Spring show, scheduled for March 15 to 17.

Juell Kadet, former executive vice president of Rogers & Hollands
MajorsDec 08, 2025
Juell Kadet, a ‘Lifelong Pillar’ of Rogers & Hollands, Dies at 96

Kadet, a 1994 National Jeweler Retailer Hall of Fame inductee, helped grow the family-owned retailer in the Chicago area and beyond.

Lumia 2 smart earrings
TechnologyDec 08, 2025
You’ve Heard of Smart Watches and Rings; Meet Smart Earrings

Billed as the world’s smallest wearable, Lumia Health’s new smart earrings have a health tracker subtly embedded in the back.

Lionheart Wildflower Double Cocktail Ring
TrendsDec 08, 2025
Amanda’s Style File: Celebrating December’s Birthstones

Don’t let those with December birthdays feel blue. Help them celebrate their month with blue zircon, turquoise, and tanzanite.

Robinson Pelham Tsar Star Earrings in Blaze
CollectionsDec 05, 2025
Piece of the Week: Robinson Pelham’s ‘Tsar Star’ Earrings

The new pink sapphire version of the piece dances with its wearer in the brand’s “Icons After Dark” holiday campaign.

Pantone 11-4201 Cloud Dancer
TrendsDec 05, 2025
Pantone’s Color of the Year for 2026 Is … White

A choice that’s generated a lot of commentary, Pantone says “Cloud Dancer” marks a fresh start and encourages relaxation and creativity.

×

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