10th century mosque in Na'in. The one below is from the mehrab of the Winter Hall at the Jameh Mosque in Esfahan. It is the most elaborate form of stucco work that we saw. I wish we could have seen it being done.
The floral designs might include arabesques of stems, leaves, and calligraphy interwoven on several levels to create a sense for depth and movement.
The stucco can also be molded to form stalactites, here at the Jameh Mosque in Esfahan, which might be covered with tiles or mirrors.
Plasterwork can also be painted.
Gypsum can also be used to form boxes which can be carved, as in the Music Room at the Ali Qapu Palace in Esfahan.