Considering the functionality of the staircase, the stone used for the steps of the five lotus staircase should beRelatively hardGenerally, granite hard stone is used. For indoor staircase treads, polished or matte granite is commonly used. For outdoor staircase treads, matte, burnt, machine cut, and other rough granite slabs are generally used. Generally, the same type of stone should be used for step boards and standing boards of stairs.