Building materials in the nature of slates for tiling; Non-metallic building materials; Non-metallic building materials for slating; Non-metallic building materials for the construction of office interiors; Non-metallic building materials having waterproofing properties; Non-metallic building materials in the form of panels; Non-metallic building materials in the form of shaped sections; Non-metallic building materials in the form of slabs; Quartz; Silica quartz; Articles of artificial stone for building purposes; Artificial stones; Building stone; Construction materials of artificial stone; Decorative paving stones; Manufactured stone; Stone veneer; Slabs, not of metal, for building