Domiteaux + Baggett Architects, PLLC this is actually the exterior material being carried into the house. this is a real stone, by that i mean a 4" thick stone, not a veneer....(and i say this only to explain the material, i have no problems with stone veneers and use them frequently when budget does not allow a true stone construction process)...this stone is Oklahoma Blue Stone....if you are local to my metroplex dallas, tx...any stone yard will know the material. obviously, if you are not, the material may likely be more expensive the further you are from the source. hope this helps!
http://www.buechelstone.com/shoppingcart/products/Chilton-Rustic.html