Marés or Calcarenita is a well-known stone in the field of construction in the Balearic Islands and is almost entirely composed of seabed remains. Until the emergence of cement in the mid-twentieth century, this stone happened to be the dominant material in constructions on the islands.

This material has a great conservation capacity which is demonstrated in examples such as Mallorca’s Cathedral, Bellver Castle and Almudaina Palace, among other emblematic Mallorquin buildings.

Although easily manipulated, Marés is vulnerable to moisture and erosion, therefore it would formerly be covered with thick layers of limestone for its protection. The rehabilitation of this stone currently involves a scraping process to recover its original texture and characteristic colours.