The “Bismillah stone” inscription is one of the significant works of the Qajar era in the Azarbaijan Museum of Tabriz since 1993. This work was crafted in Cairo, Egypt by an Iranian artist named Mohammad Ali Quchani known as Mirza Sangalakh. The artifact comprises five segments, collectively weighing approximately more than three tons. Most of damages caused in this work, considering its delicate decorations and substantial weight, has been attributed to its multiple relocations. In addition to very delicate carvings, the surface of the work is decorated with blue, gold, green, black, white and red colors. It seems that in addition to the ups and downs history of this work and its cultural significance within contemporary society, particularly among the people of Tabriz, only a review of its history will not be enough to express its status, value and unique characteristics. Therefore, a more detailed and scientific study could significantly enhance the understanding and appreciation of this work. Furthermore, for improved preservation and potential restoration of the work, documentation and scientific studies are needed for this magnificent work. To identify the materials and origins of existing colors, the application of scientific and laboratory methods was put on the agenda. To achieve this, two methods of classical chemistry testing and EDX analysis were employed to identify the present colors. the results confirmed the presence of indigo, copper rust (cuprous oxide), gold powder, Shangraf (cinnabar), bone soot and sheikh white (white lead) in the coloration of the artifact.
