Itacolumitas are special sandstones which reach this unexpected flexibility due to special interlocking of its grains, coming from its geological growth. Name comes from the Brazilian country of Itacolumia, Minas Gerais, where it was firstly identified.  This strange elastic behavior developed by nature, has been focused by scientists of different areas due to, for example, potential application of itacolumite inspired microstructures, to develop flexible concretes capable to resist, in terms of its own flexibility, vibration coming from earthquakes.