With PRAIRIE STONE Fabbrica del Vignola continues its rediscovery of the greatest architects of all time and pays homage to Frank Lloyd Wright, a grand master of the 20th century. PRAIRIE STONE reinterprets F.L.Wright through the natural elements that distinguished his work by creating a line of slates with plain, elegant surfaces giving a highly natural, unique effect to places where they are used. The line offers 3 different modular sizes and 3 colour produced by blending three different mixes prepared with different designs and tones on several pre-compacting lines and later mixed and rectified after the firing.