The stone is currently being fabricated by Campolonghi Italia S.p.A. at the La Facciata quarry site. The material has been used for several exterior projects, including load-bearing temples, which gave the architects confidence that the stone would be suitable for the project from a practical standpoint.
A total of 20,000 tons of stone is being quarried for the project, and it comes from one specific section - which has further been broken down into four sub-sections. Representatives from Snøhetta visited the quarry site to determine what would be most appropriate for the project, which it refers to as a “sculpted landscape.†The building form will have a “landmark quality obtained through a memorable yet discreet silhouette,†according to the architects, with a sloping roof rising directly from beneath nearby fjord. This vision for a Norwegian landmark is being made a reality over 1,000 miles to the south in Carrara, Italy, where Campolonghi's team is currently extracting and processing stone to be shipped to the jobsite in Oslo.