Reinforced marble or stone plates (10) for application in coffins, coffins and funerary elements from marble or stone slabs of the rough blocks, characterized in that it comprises two parallel marble or stone plates (20), which are joined by a honeycomb panel (30) formed by a honeycomb core, made up of hollow hexagonal cells between the vertical walls, which is placed in layers between the two parallel marble or stone sheets (20) such that it forms a sandwich panel. (Machine-translation by Google Translate, not legally binding)