SimplexDiam, Inc. Competitors

At GIA, we believe every gem has a story — formed deep within the earth and revealed through science. For nearly 100 years, we’ve been bringing those stories to light through research, discovery and education. As a nonprofit, our mission is to ensure confidence in gems and jewelry by blending innovation, knowledge and science. From creating the 4Cs of diamond quality to inventing tools used worldwide, we make learning an adventure and turn discovery into truth. We don’t buy, sell or appraise gems. Instead, we provide trusted reports, education, and insights that help people — from industry professionals to everyday consumers — make informed decisions with clarity. This is GIA: where curiosity fuels innovation, knowledge builds confidence and science inspires a world of trust.

Since 1913, we’ve been committed to supporting the jewelry industry and putting customers at the center of everything we do. With over a century of trusted expertise, we’re financially strong, forward-thinking, and driven by curiosity. Guided by our core values of Agility, Accountability, and Relevancy, we lead through innovation. As a technology-focused organization, we embrace cutting-edge tools and data-driven insights to continuously improve our products, services, and customer experience. Our mission is to be the industry’s most trusted advisor by investing in our people, adopting new technologies, and striving for excellence. We’re dedicated to fostering growth through collaboration, powered by bold thinking, teamwork, and the passion of our people. The company has received the following notable recognitions or awards: •A+ Superior Rating from AM Best for 38 consecutive years, as of November 2024 •Ward’s 50® List of top-performing property-casualty insurance companies for 15 consecutive years •Great Place to Work Certification™ for 2024-2025 •Deloitte’s Wisconsin 75™ for 6 consecutive years •2024 Fastest Growing Companies in Northeast Wisconsin •Inc’s Power Partner Award, 2023 •Platinum-Certified Fox Cities Employee Friendly Workplace •Champion of Young Professionals by the Fox Cities Chamber For information about Jewelers Mutual, visit JewelersMutual.com.

Stuller, Inc. was founded by Matt Stuller in 1970. From our manufacturing and administrative headquarters in Lafayette, Louisiana, we provide next-day shipping, for more than 200,000 different items to over 40,000 jewelry professionals throughout the world. Stuller's core product categories include: bridal jewelry, jewelry, mountings, diamonds, gemstones, findings, metals, tools and supplies.