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

Mark and Candy Udell on stage at the 2026 Gem Awards
Events & AwardsMar 17, 2026
The Best Moments From the 2026 Gem Awards

Held just before the Oscars, the jewelry industry’s big awards show had its share of standout jewelry, gowns, and acceptance speeches.

Winter Tourmaline
SourcingMar 17, 2026
Cruzeiro Mine Debuts ‘Winter Tourmaline’

The Brazilian mine’s new collection features cabochons in soft, muted shades like silver and lilac.

Natalie Portman in Tiffany & Co. Jewelry
TrendsMar 17, 2026
Natalie Portman Is Tiffany & Co.’s New Ambassador

The Academy Award-winning actress stars in Tiffany & Co.’s latest commercial, which debuted Sunday night during the Oscars.

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.

Jean-Marc Duplaix
MajorsMar 17, 2026
Kering Establishes Jewelry Division, Appoints CEO

The organizational change follows Kering’s promise of a transformation after declining sales in 2025.

Weekly QuizMar 12, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Anne Hathaway and Rose Byrne
EditorsMar 16, 2026
2026 Oscars Jewelry: One Necklace After Another

Natalie Francisco rounds up the top Oscars jewels, including Rose Byrne’s Taffin necklace with a more than 20-carat yellow-brown diamond.

Tag Heuer CEO Béatrice Goasglas
WatchesMar 16, 2026
TAG Heuer Has a New CEO

Béatrice Goasglas has been with TAG Heuer since 2018. She is the first woman to head the 166-year-old, LVMH-owned watch brand.

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.

Ben Bridge Jeweler Honolulu boutique
IndependentsMar 16, 2026
Ben Bridge Debuts New Honolulu Boutique

The store features the first in-store build for the jeweler’s in-house “Bella Ponte” bridal brand.

Bonhams fine jewelry Paris
AuctionsMar 16, 2026
Bonhams Paris To Offer Antique, Signed Jewels

The live fine jewelry auction will take place later this week, showcasing antique pieces, rare gemstones, and signed jewels.

Silvia Furmanovich Horse Mane Earrings, Cece Jewellery Underworld Triptych Necklace, Almasika Invictus Flower Brooch
CollectionsMar 13, 2026
A Trio of Jewels from the 3 Gem Award Nominees for Jewelry Design

Our Pieces of the Week honor the 2026 nominees for the Gem Award for Jewelry Design, Silvia Furmanovich, Cece Fein-Hughes, and Catherine Sarr.

Vera Wang
WatchesMar 13, 2026
Citizen, Vera Wang to Launch Watch Collection

The 24-piece watch collection is set to debut in spring 2027.

Andrea Pooler
SourcingMar 13, 2026
Andrea Pooler Joins Third-Generation Diamond Company as COO

Pooler, who has more than 25 years’ experience in jewelry, is now chief operating officer of Modani Jewels, Soham Diamonds, and SNJ Creations.

24 Karat Club banquet
MajorsMar 13, 2026
24 Karat Club of New York’s Banquet to Return to Waldorf Astoria

The reopening of the Waldorf Astoria means a homecoming for the industry group’s annual event, which will take place Saturday.

Zoë Kravitz in Jessica McCormack’s Planetary Necklace
CollectionsMar 12, 2026
Jessica McCormack Sends Gold, Gemstones Into ‘Orbit’

McCormack looked to the 19th century’s “golden age” of astronomy when designing her new celestial-themed collection.

Johnny Nelson Wins David Yurman Gem Award Grant Graphic
Events & AwardsMar 12, 2026
Johnny Nelson Wins David Yurman Gem Awards Grant

Nelson will be honored as the inaugural grant winner at the Gem Awards gala on Friday.

David Berdugo
TechnologyMar 12, 2026
Caratwise Launches, Names Former Signet Exec CEO

The new smart design software allows jewelers to configure, price, and confirm a custom engagement ring in real time for in-store customers.

Woman working at bruting machine, seal at new Grandview Klein factory in South Africa
SourcingMar 12, 2026
Grandview Klein Opens New Factory in South Africa

The 10,000-square-foot diamond manufacturing facility officially opened in late February and employs 50 people.

MJSA Education Foundation logo
Events & AwardsMar 12, 2026
MJSA ‘Future of Jewelry Making’ Scholarship Applications Open

The MJSA Education Foundation’s scholarships support students pursuing jewelry careers.

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.

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.

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.

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.

×

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