The Niavaran Cultural-Historical Complex is situated within a vast garden of approximately 11 hectares garden in northern Tehran, characterized by its rich natural beauty and historical significance. The buildings in this complex date back to the Qajar and Pahlavi eras, including the Sahebqaranieh Palace, the Ahmad Shahi Pavilion, Niavaran Palace, a private library, and the Jahan Nama Museum. Among these, the Ahmad Shahi Pavilion, one of the Qajar palaces in the complex, lacks any dated inscriptions or historical markers.; however, evidence suggests that this building was constructed during the reign of Ahmad Shah Qajar. This two-story building houses personal belongings of Reza Pahlavi. On the ground floor, in the western section of the building, there are two rooms separated by glass display cases. Four large glass display cases segregate these two rooms, containing 106 pieces of rough and cut precious and semi-precious stones, along with several fossils. The primary objective of this article is to study and identify the stone and fossil specimens present in these display cases. The studied stones are primarily quartz in various colors, alongside mineral specimens such as pyrite, chalcopyrite, stibnite, sulfur, and precious stones like beryl, as well as various types of fish fossils, ammonites, trilobites, and contemporary fossils such as corals and fish. Three notable specimens in these display cases include a natural diamond associated with a kimberlite host rock, likely originating from South African mines; a tektite meteorite sample brought from the moon, which was gifted by then-President t Nixon; and several beautiful rough turquoise mineral samples with a host rock originating from the Nishapur turquoise mine. A significant drawback of this collection is the lack of historical information regarding how these collectible specimens were gathered, purchased, or gifted, and by whom.