Rk international offers limestone. Limestone almost looks like slate, having natural cleft finish, but the colors are different. Limestone is very attractive, hard & brittle when compared to slate. Limestone is used in exteriors-including wall cladding, statuary-and interiors-including floors, stairs, and decorative stonework. Limestone floor tiles can be fixed using a binding material such as cement or any other synthetic adhesive. These are available in hand cut, machine cut and tumbled [antique tiles], and are offered in customized sizes to suit the customer requirements.