DiamondBuzz
GIA icon Tom Moses to retire after 50-year legacy
Legendary gemologist who helped shape global diamond grading standards steps down after five decades at GIA
Tom Moses, executive vice president and chief laboratory and research officer at the Gemological Institute of America (GIA), is set to depart after nearly 50 years of trailblazing service.
Moses spearheaded GIA’s global footprint, elevating it to the pinnacle of gemology and education worldwide, the institute announced last week. He’ll stay on through May’s end to ensure a seamless handover, then transition to chief of gemological research emeritus—a fitting tribute to his indelible mark.

“The rigor Tom infused into grading, the discipline he championed in science, the laser focus on customers, and the humility in leadership embody GIA’s gold standard,” said GIA CEO Pritesh Patel. “His five decades aren’t just tenure—they’re the engine of our explosive growth, fueled by relentless commitment, curiosity, and command.”
A graduate gemologist since joining GIA’s California lab in 1976, Moses climbed through key leadership posts, co-authored over 100 technical papers in Gems & Gemology and peer journals, snagged the 2002 Richard T. Liddicoat Award, and joined the board of governors in 2013.
DiamondBuzz
Susie Dewey Appointed Chief Marketing Officer At Natural Diamond Council
Seasoned Global Marketer Joins To Elevate The Narrative Of Natural Diamonds and Drive Cultural Relevance Worldwide
The Natural Diamond Council today announces the appointment of Susie Dewey as Chief Marketing Officer (CMO), marking a significant step forward in strengthening its global marketing leadership and cultural influence.
Susie joins the organisation with over 17 years of experience shaping and evolving globally recognised fashion and lifestyle brands. She has held senior leadership roles across internationally renowned companies, including Tapestry, NET-A-PORTER and Michael Kors, following an early career in PR at Topshop and Burberry.
Throughout her career, Susie has led integrated marketing strategies, global partnerships and high-profile brand activations—building a strong track record of driving brand growth, customer acquisition and cultural relevance across international markets.
In her role as CMO, Susie will lead the Natural Diamond Council’s global marketing and communications strategy, further elevating the narrative of natural diamonds and strengthening the organisation’s position at the intersection of culture, creativity and impact.
Susie brings an integrated approach to modern marketing, combining creative and commercial thinking to translate brand vision into insight-led campaigns that deliver measurable business impact. Known for her instinctive understanding of brand building, she has consistently positioned brands at the centre of cultural conversations.
A collaborative and emotionally intelligent leader, Susie is deeply committed to building high-performing teams and fostering environments where talent can thrive.
– Amber Pepper, CEO, National Diamond Council

“Susie’s appointment marks an exciting moment for the Natural Diamond Council. Her ability to connect brand, culture and commercial impact makes her exceptionally well placed to lead our global marketing efforts.”
– Susie Dewey, CMO, National Diamond Council
“I’m incredibly excited to join the Natural Diamond Council at such a pivotal time. The opportunity to shape the global narrative around natural diamonds is one I’m truly passionate about.”

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