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 is the current publisher of licensed Disney comic books, starting in June 2003. The company also reprints EC Comics of the 1950s. Additionally, the company is the current home of The Overstreet Comic Book Price Guide.

Gemstone also issues annual editions of Christmas Parade, Vacation Parade and Spring Fever, a giveaway for Free Comic Book Day, and occasional special editions (including comic adaptations of Mickey, Donald and Goofy: The Three Musketeers and Mickey's Twice Upon a Christmas). Its first book, Mickey And The Gang: Classic Stories In Verse, a compilation edited by David Gerstein of Disney cartoon story pages published from 1934 to 1944 in Good Housekeeping Magazine, was issued Nov. 2005. Gerstein has since edited two softcover collections that are official tie-ins to the Walt Disney Treasures DVD collections: Disney Comics: 75 Years of Innovation (2006) and Uncle Scrooge: A Little Something Special (2008).