With the participation of the Governor of Sonora, Guillermo Padrés; the General Coordinator of Mining Jimena Valverde and the General Director of the Mexican Geological Service, Dr. Rafael Alexandri; the "First Seminar on Dimensionable Rocks" was held in the city of Hermosillo, Sonora. During the opening ceremony, Rafael Alexandri, in his speech, emphasized that Mexico has an enormous potential of dimensional rock deposits that can be explored, exploited and commercialized both inside and outside our borders. The Director of the Mexican Geological Service informed that as a result of the