Der „Diaspro di Giuliano“ in der Corsi Collection am Oxford University Museum of Natural History vom Anfang des 19. Jahrhunderts hat genau dieselbe Ausbildung wie die beiden Stücke aus sizilianischem Jaspis im Steinkabinett von Heinrich Taddel (Inv.-Nr. OUMNH 764, Originalnummer bei Corsi Diaspro 17). © Oxford University Museum of Natural History. Figure 2. „Diaspro di Giuliano“ from the Corsi Collection at the Oxford University Museum of Natural History compiled at the beginning of the 19th century (inventory number OUMNH 764, original Corsi number: Diaspro 17). The sample displays the same characteristics as the two slabs made of Sicilian jasper in the stone collection by Heinrich Taddel. © Oxford University Museum of Natural History.