Ahmad Aghaei Pistachio ( Long iranian Pistachios ) : This type of Pistachio (Long Ahmad Aghaei Pistachio) is one of the popular types. The reason why it is popular than the other type of pistachio is that it has the lightest shell color. The color of the Pistachio shell is naturally light cream. However, Ahmadaghaie shell is brighter than the other types. As it is clear from its name, it is one of the long shape types of pistachios.