This is a beautiful souvenir sheet, issued by St. Thomas & Principe in 2009, displaying dinosaurs and minerals. Featured on the sheet are pseudomorphs of Copper after Aragonite, Quartz on Fluorite, the Sordes, the Batrachognathus, the Lufengosaurus, Hematite, the Neovenator, Electric Green Fluorite, Shattuckite, the Platecarpus, and Vanadinite. The sheet is Post Office fresh, mint never hinged, and F/VF.