Gemstone Publishing is a U.S. company that publishes comic books and collectors' guides. The company was formed by Diamond Comic Distributors President and Chief Executive Officer Stephen A. Geppi. Gemstone published licensed Disney comic books from June 2003 until November 2008. The company has reprinted EC Comics of the 1950s. Additionally, the company is the current home of The Overstreet Comic Book Price Guide. [1]