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Deleuse Designer Jewelry is a family-owned business established in 1945, specializing in fine jewelry custom designs, restorations, insurance and estate appraisals, and diamond brokerage. Led by Graduate Gemologist and Certified Appraiser Jeff Deleuse, the company operates from Fairfax, California, with a testing lab on premises.
AI named Deleuse Jewelers in February 2026.