“Gris Pinar” sandstone and “Dorada Ubrión” sandstone cladding.
The “Gris Pinar” sandstone is grey/green coloured, and petrographically it is a medium grain sandstone which has quartz and feldspars as its main components.
The layout of the strata in large banks allows large blocks of high tonnage to be obtained. These blocks are then prepared into different sizes and surface finishes.
The “Dorada Urbión” sandstone is a variegated light beige sandstone with medium grain where quartz is predominant. There are also small amounts of micas that provide tiny shiny sparkle specs to the cut surface, as well as oxide-hydroxides that create small veins and give rise to several subvarieties. The rock is extracted at a sandstone level that is interspersed with both clayey and conglomeratic.
It is obtained from a quarry in Burgos (Spain), with estimated reserves of about 500,000 m³. The raw materials are elaborated in this same area so ashlars and cladding are prepared with finishes such as sawn cut, honed, bush hammered, pitch-faced, antique and sandblasted.