The bloodstone jasper of Espejón Curiosity · Espejón, Tierras del Burgo, Soria Image of Espejón, not of the place itself. The red limestone veined from these quarries was the most prized Spanish ornamental stone of the sixteenth century. It was carved for the cathedrals of Toledo, Burgos and Segovia, for El Escorial and for the Royal Palace of Madrid. Photo: Gelillo85 (CC BY-SA 4.0) What to see and do in Espejón