Granite Stair Step,Riser,Landing 1.Spiral, Circular, Straight 2.Polished, Honed,Flamed 3.Red,Black,Grey,Yellow,White,Pink. Product Name: Granite Stair Step,Riser,LandingWe are producing inside and outdoor Natural Granite Stairs, For inside one, the steps are always polished granite panel, but there are three types of outdoor stairs: flag stone steps, solid stone steps, and border stone steps, ...