SPAIN,... I want to buy China Yellow Sandstone to cover the exterior and some interior walls of a house in constraction.The yellow sandstone should be hell and with a calide tone and have a uniform colour.Additionally we are looking for Travertino Stone, also to cover part of the walls.(Name: China Yellow Sandstone, Country:China, http://www.stonecontact.com/stone-China-Yellow-Sandstone.htm)