The Cup of Djemscheed (a cup used for divination in Persia)

The Djemscheed also known as The cup of Jamshid, or “Jaam-e Jam” in Persian.

The cup has also been called Jam-e Jahan nama, Jam-e Jahan Ara, Jam-e Giti nama, and Jam-e Kei-khosrow. The latter refers to Kaei Husravah in the Avesta, and Sushravas in the Vedas.

It was a divination cup which, in Persian Mythology, was long possessed by the rulers of ancient Greater Iran and has been the subject of poems and myths in ancient Persia.

It was thought to have been found while digging the foundations of Persepolis. The cup ("Jām") was said to be filled with the elixir of immortality and was used in scrying. It was said that within the cup it mirrored the whole world and that one could observe all the seven heavens of the universe by looking into it. All good and evil was revealed within the cup and divinations within the Cup were said to reveal deep truths. The Persians put great faith in these revelations; and attributed the prosperity of their empire to the possession of this famous cup.

Sometimes, especially in popular depictions such as The Heroic Legend of Arslan, the cup has been visualized as a crystal ball. Helen Zimmern's English translation of the Shahnameh uses the term "crystal globe".