There are different natural stones for wood design. Starting from petrified wood, quartzite, brown sintered stones (Onyx) to limestones, travertines, and sandstones. The natural stones are available in large formats. Primarily used in the exclusive sector. Level-access shower trays made from a single piece meet the highest quality standards. Bathtubs and basins made from the same material are also possible. Floor coverings, walls, and bathtubs can be heated if required. With today's possibilities of different heating systems and controls, this is achievable within an acceptable cost framework. Especially bathrooms and showers should be easy to clean. Therefore, I recommend keeping the proportion of mineral joints as low as possible.
The manufacture and installation of Terrazzo shower trays should only be carried out by truly skilled specialist companies in this field. With Terrazzo, cracking can occur. (Microcracks are allowed to a certain extent).