AuctionsJun 09, 2025
Nancy Astor’s Cartier Tiara Sells for $1.2MThe rare turquoise and diamond jewel was the top lot at Bonhams’ June jewelry sale.
GradingSep 17, 2013
French gem association honors Koivula, Liddicoat
The French Association of Gemmology has named gemologists John Koivula and the late Richard Liddicoat as among the 50 personalities who’ve shaped the history of gems.
Carlsbad, Calif.--The French Association of Gemmology has named gemologists John Koivula and the late Richard Liddicoat as among the 50 personalities who’ve shaped the history of gems.
The association recognized both Koivula and Liddicoat in the modern and contemporary gemology category. The two were honored in Paris on Sept. 5 as part of a celebration of the association’s 50th anniversary.
Koivula is the Gemological Institute of America’s chief research gemologist, joining the organization in 1976. He has spent more than 50 years studying and photographing gemstones, and has published more than 800 articles and notes on gemstone inclusions and related topics.
A noted authority on microscopy, photomicrography and gemstone inclusions, Koivula also is the author of MicroWorld of Diamonds, co-author of the three-volume Photoatlas of Inclusions in Gemstones and co-author of Geologica, a book on geological landforms.
Liddicoat was a former GIA president, beginning with the institute in 1940 as the assistant director of education. His early work on colored stones led to the publication of his Handbook of Gem Identification in 1947.
Liddicoat exceeded Robert Shipley as the GIA’s executive director in 1952 and became editor-in-chief of Gems & Gemology, a position he held for 50 years. He was the architect of the GIA’s D to Z diamond grading system, and co-authored the first editions of The Diamond Dictionary and The Jewelers’ Manual.
In 1971, Liddicoat expanded the GIA’s educational offerings to Japan, marking the institute’s international expansion. He stepped down as GIA president in 1983 and served as chairman of the board of governors for the organization until his death in 2002.
More on Grading
The Latest
MajorsJun 09, 2025
RDI Diamonds Partners With LavalierThe diamond wholesaler is working with the insurance provider to seamlessly offer personal jewelry insurance to RDI retailers’ clients.
Events & AwardsJun 09, 2025
Here Are the 2025 Retailer Hall of Fame InducteesThis year’s honorees include a Midwest retailer and two multi-store independents, one in New York and the other in New England.
Brought to you by
Jewelers of America is Headed to Las Vegas for JCK 2025The countdown is on for the JCK Las Vegas Show and JA is pulling out all the stops.
Events & AwardsJun 09, 2025
CASE Awards Now Accepting Entries For 2025The deadline to submit is June 16.
Weekly QuizJun 05, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
CollectionsJun 06, 2025
Piece of the Week: Harwell Godfrey’s ‘Granny Squares Eleanor’ Necklace As an homage to iconic crochet blankets, the necklace features the nostalgic motif through a kaleidoscope of cabochon-cut stones.
Events & AwardsJun 05, 2025
The 12 Fresh Faces in Couture’s Design AtelierDiscover the dozen up-and-coming brands exhibiting in the Design Atelier for the first time.
Brought to you by
The True Power Behind the Counter: Why Sales Associates Are the Heart of the Jewelry BusinessWhen investing in your jewelry business, it's important not to overlook the most crucial element of success: the sales associates.
SourcingJun 05, 2025
A Rare Suite of Rubies Has Arrived in Las VegasThe “Royal Ruby” Collection is a quintet of untreated rubies curated by collector Jack Abraham.
Events & AwardsJun 05, 2025
Daymond John to Give Keynote at JCK Las VegasThe entrepreneur and “Shark Tank” star will share his top tips for success.
MajorsJun 05, 2025
Platinum Guild International Updates Leadership TeamTwo existing executives have been given new roles.
Events & AwardsJun 05, 2025
Zillion Announces 'Women in STEM' Scholarship RecipientMeredith Tiderington, an electrical engineering student, was selected for the award.
Lab-GrownJun 04, 2025
GIA Reverting to More General Terminology for Lab-Grown DiamondsIt will quit assigning the stones specific color and clarity grades in favor of applying “new descriptive terminology.”
Events & AwardsJun 04, 2025
As JCK Talks Returns, Don’t Miss These 12 SessionsFrom design trends to sustainability, here’s a roundup of can’t-miss education sessions at JCK Las Vegas.
CrimeJun 04, 2025
10 Safety Tips for the Las Vegas Shows The Jewelers’ Security Alliance offers advice for those attending the annual trade shows.
MajorsJun 04, 2025
Amy Curran Promoted at Hill & Co.Her new role is director of strategic initiatives.
CollectionsJun 03, 2025
In Her Latest Collection, Viviana Langhoff Is Leaning Into GoldThe designer is embracing bold pieces with weight to them in “AU79,” a collection she celebrated with a creative launch party.
FinancialsJun 03, 2025
Signet Jewelers Sees Turnaround in Q1 With Sales Ticking Up 2%On an earnings call, CEO J.K. Symancyk discussed what’s working for the company and how it’s preparing for the potential impact of tariffs.
SurveysJun 03, 2025
Consumer Confidence Improves in May The index partially rebounded after months of decline, due in part to the U.S.-China deal to temporarily reduce import tariffs.
CollectionsJun 03, 2025
Dakota Johnson Is Roberto Coin’s New Brand AmbassadorThe actress stars in the latest campaign set in Venice, Italy, and is set to participate in other creative initiatives for the jeweler.
SourcingJun 02, 2025
Gemfields’ June Auction to Include 36-Carat RubyThe large stone will be offered at its June sale along with a selection of secondary-type rubies from a new area of the Montepuez mine.
TrendsJun 02, 2025
Amanda’s Style File: Three Gems for June Those born in June have a myriad of options for their birthstone jewelry.
SourcingJun 02, 2025
David Allouche Joins Grandview Klein DiamondsThe diamond industry veteran has been named its senior sales executive.
FinancialsMay 30, 2025
Movado’s Q1 Sales Slip Amid ‘Challenging’ Retail Environment The company plans to raise the prices of select watches to offset the impact of tariffs.
Policies & IssuesMay 30, 2025
Tariffs & Designers: Navigating Pricing in an Unstable EnvironmentBetween tariffs and the sky-high cost of gold, designers enter this year’s Las Vegas shows with a lot of questions and few answers.
CollectionsMay 30, 2025
Piece of the Week: Renato Cipullo’s ‘Hematite Blaze’ NecklaceDesigned by founder Renato and his daughter Serena Cipullo, it showcases a flame motif representing unity and the power of gathering.
Policies & IssuesMay 30, 2025
Trade Court Declares Trump’s Tariffs InvalidHowever, the tariffs remain in effect in the short term, as an appeals court has stayed the U.S. Court of International Trade’s decision.
