Salt White Extra is quarried and processed in Vietnam using italian gang saws and polishing lines, the factory selects only the large, clean blocks for Arizona Tile orders. The grain structure on this marble is consistent from shipment to shipment. A polyester resin is applied to the face of each slab to fill in any pits. Salt White Extra is a crystalline, ultra white marble. As a natural stone product, it is recommended that this be sealed to extend its longevity.