Leather logen stone from granite Stone mines of south khorasan province, Birjand county is extract. The green tonality of this stone, it has become one of the most unique and impressive granite stones Birjand leather logen granite stone can be processed as a slab by Polish -leather method. A significant amount of slabs of this unique stone is exported all over the world. Leather logen stone because of its special color and design is used in luxury construction projects for internal and external decoration. An inherent features of this stone can be mentioned to: high density, excellent polishing, high abrasion and compressive resistance and lack of water absorption.