G603 granite stone step 1.material: granite, marble, travertine, slate, sandstone 2.Color: grey, red, yellow, green, black etc G603 granite stone step:Our steps, stairs, risers and treads are various in color and dimension either. Material could be in granite, marble, travertine, slate, sandstone etc. We have our own standard as following, but your own design is also welcomed.Steps and risers: ...