[Class : 19] Silica [Quartz]; Silica For Use In Building; Quartz For Building And Construction; Refractory Granules; Fillers For Repairing Walls; Foundry Moulds (Non Metallic ); Building And Construction Materials And Elements Made Of Sand, Stone, Rock, Clay, Minerals And Concrete; Materials, Not Of Metal, For Building And Construction; Rigid Pipes, Not Of Metal, For Building; Asphalt, Pitch, Cement, Tar And Bitumen; Transportable Buildings, Not Of Metal; Monuments, Not Of Metal; Glass Panels; Building Glass; Cristobalite Used As Building Material; Silica [Quartz]; Silica Sand; Aggregates; Aggregates For Use In The Preparation Of Concrete; Ceramic Articles For Construction Purposes; Refractory Construction Materials, Not Of Metal; Refractory Granules; Glass Granules For Marking Roads