Manchester jeweler awarded Registered Jeweler title by the American Gem Society

Apr. 9—MANCHESTER — Marc Duquette, was awarded the title of Registered Jeweler of the American Gem Society, an association of professional jewelers in North America.

Duquette is the store manager of Day's Jewelers in Manchester, an AGS accredited Jeweler. Duquette's work at Day's brought him to the American Gem Society Registered Jeweler program. By earning this prestigious title, he has demonstrated extraordinary knowledge and experience in the jewelry industry, especially in the field of diamonds.

"A professional title from the American Gem Society is one of the highest honors one can achieve in the jewelry industry," said Michael Richards, CG, president of the American Gem Society board of directors. "An American Gem Society title cannot be earned easily and is a guarantee of expertise, knowledge and ethics."

To earn this title, Duquette has completed required coursework and classroom study, along with written and practical exams in diamond grading. His certification regards him among the leading authorities on diamonds in the U.S., speaking to both his incredible knowledge and dedication to the jewelry industry.

"We're very proud of Marc and his many accomplishments in the field of diamonds," saud Joseph Corey, Day's president. "Diamonds have been the core of our business for more than 108 years. In 2011, DeBeers, the world's largest and oldest diamond mining company, selected Day's Jewelers to represent their diamonds in Northern New England. Marc is helping Day's to uphold our commitment to DeBeers and to our customers to provide the highest level of expertise and professionalism in the diamond business."

Since 1934, the American Gem Society has been dedicated to consumer protection. In addition to satisfying the American Gem Society's criteria, including recertification on a yearly basis, members have shown a proven commitment to their community and the highest standards of ethical practice.

Only one in 20 retail jewelers have chosen to meet the exacting standards required for membership. When purchasing fine jewelry, shop with confidence by visiting a credentialed American Gem Society jeweler.

You can find an American Gem Society jeweler at For more information regarding the American Gem Society, call 866-805-6500 or visit the AGS website at

Day's Jewelers, a Maine-based employee-owned company, was founded by the Davidson brothers in Portland in 1914 and employs approximately 140 people in Maine and New Hampshire. Kathy and Jeff Corey, natives of Madawaska, Maine, purchased Day's from the original founders in 1988 and sold the company to employees in November 2021. Day's Jewelers has eight physical store locations as well as a full e-commerce website. All Day's locations feature full-service departments and custom jewelry designers. Day's was selected as "Retailer of the Year" by Retail Association of Maine in 2016 and "Corporate Retailer of the Year" by the Woman's Jewelers Association of America in 2017 and Maine's Family Business of the Year in 2019. The company has been selected among "Best Places to Work in Maine" for seven years.

To learn more about Day's Jewelers, visit