... marble,granite.slate 2. color: black, brown,green.white,yellow 3.surface: polish,honed Nature stone step stairswe can supply various of ... nature stone stairs design,welcome to contact with us. MaterialsNatural Stone (more materials availalbe: granite, ... stairs ,spiral stairs ,arc stairs Popular stone for steps granite:G603,G636,G664,G687,G654,G562,G682,G684,absolute ...