The 2010 Topps Chrome Calvin Johnson #C193 Purple Refractor trading card is a highly sought-after collectible for fans of the Detroit Lions and football enthusiasts alike. With only 555 copies in existence, this limited edition card features a unique purple refractor parallel variety that sets it apart from the base set. As part of the National Football League (NFL) series by Topps, this card showcases the exceptional skills of Calvin Johnson in the 2010 season, making it a valuable addition to any sports trading card collection.