About Us

Since 1958, The Gem Lab has been a trusted name in fine jewelry, renowned for expert craftsmanship, ethical practices, and a passion for excellence. Founded by Joseph A. Cassarino, FGA, a distinguished gemologist, The Gem Lab began as a one-room shop in downtown Rochester, serving as the jeweler’s jeweler with expert gem identification, jewelry repair, and custom design. Over the decades, The Gem Lab grew into a family legacy, now spanning three generations of certified gemologists and jewelry experts. With Paul Cassarino, FGA, GG, ISA-CAPP leading appraisals and estate services, and Lori DeMay curating designer collections, the store continues to evolve while maintaining its unwavering commitment to quality and personalized service. Today, Amy Jo Derks, GG represents the next generation, bringing expertise in custom jewelry design, CAD technology, and restoration. From engagement rings and fine fashion jewelry to estate appraisals and bespoke designs, The Gem Lab blends tradition with innovation. Located in Henrietta, NY, our expanded showroom offers an inviting space where clients discover timeless treasures with expert guidance. Experience exceptional craftsmanship and unparalleled service—because every piece tells a story.

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