Darney Heritage Stone Bricks are natural sandstone bricks quarried and processed in Northumberland. The bricks are cut from sandstone blocks to replicate traditional masonry dimensions. They are used for heritage restoration and new build construction where natural stone appearance is required. Performance values such as compressive strength and fire classification are not provided on the webpage. Installation follows traditional masonry techniques. The material is natural sandstone with no added binders. Manufacturing and quarrying take place in the United Kingdom.