Like sandstone, their natural ability to split along foliations have made quartzites usable for wall cladding & roofing tiles. They are harder than sandstones. Quartzite are metamorphosed quartz sandstones. Having himachal black quartzite, silver grey quartzite, copper quartzite, flagstone old quartzite for wall-cladding, roofing, flooring and all other types of interior & exterior applications.