From Tolkien Gateway

The Ithil-stone was the palantír that stood in Isildur's ancient fortress of Minas Ithil, placed there soon after the founding of the city. The stone was captured by the Nazgûl in T.A. 2002 when the city fell to them[1] and became known as Minas Morgul. The stone was used by Sauron to entrap Saruman and deceive Denethor during the War of the Ring.[2] It is likely that the stone was destroyed in the fall of Barad-dûr.


The Palantíri
 Stones of Arnor  † Annúminas-stone (Annúminas) · Elostirion-stone (Elostirion - Valinor) · † Amon Sûl-stone (Amon Sûl - Fornost)
Stones of Gondor   † Osgiliath-stone (Osgiliath) · † Ithil-stone (Minas Ithil - Barad-dûr) · Anor-stone (Minas Tirith) · Orthanc-stone (Orthanc - Minas Tirith)
Other  Master-stone (Tower of Avallonë)