Since its founding in 1918, Leon Miller & Co. has been a family-run business based in Pittsburgh, Pennsylvania. Leon Miller started his jewelry repair shop as a young Lithuanian immigrant. Over the years, it evolved into a manufacturer of jewelry made of diamonds, gemstones and precious metals. Leon Miller & Co. has been run by Leon's sons Arnold and Fred since the 1970s. The company has a reputation among independent jewelers as a creative, customer- friendly manufacturer of popular designs as well as one-of-a kind creations.